When you change code, how do you know that you’re not breaking something? If the code change is small, it can be pretty easy (especially if you have tests). I’m talking about more complicated code changes.
Sure, you have unit tests, but how do you know that everything in the system works together correctly?
Sure, you have integration tests in your code, but how do you know that all of the systems involved are working together?
Sure, you have end to end acceptance tests for all of the scenarios that you know about, but what if a scenario exists that you didn’t think of?
We can come up with any number of excuses for why bugs happen in production. But what happens when a bug could cause a big problem?
I’m in this situation right now because the relatively large code change I’m implementing could impact how much money we charge our customers. The code I’m writing takes in some input files from a third party and processes them. We could have a big problem if someone gets overcharged or undercharged, or even worse, not at all. There are lots of things that can go wrong. I have a lot of good acceptance tests for my code, so I have good test coverage for the scenarios that I know. What I worry about is the scenarios that I don’t know, or what could cause my code to not get called at all. Because of this, I have to think past the traditional ways that I usually test things.
Searching for test cases
I did a lot of analysis on the data that my code is going to consume. I even wrote some small apps and SQL queries that will parse historical data and look for different combinations of data, and used that to come up with the test cases. What’s tricky is that some of the scenarios do not happen very often, so that means I need to do more digging to find them. At some point, this can become tedious, but in my case it’s worth it.
Watching for unexpected scenarios
Thanks to my data analysis, I have a list of expected scenarios that I’ve seen from past data. In addition to writing tests for all of these scenarios, I’m also writing some queries that will check for evidence that some unexpected scenario happened in production, and I’m running these queries every day. By doing this, I’ll be aware of any potential changes in how the source data comes in, and I also avoid having to write acceptance tests for scenarios that probably aren’t going to happen.
Throw exceptions when you find unexpected scenarios
Not only do I have queries to check for unexpected scenarios, I also have inline checks that will cause the process to stop and throw an exception if I encounter specific unexpected scenarios that could cause an issue, especially when the issue would not otherwise be obvious (in other words, it wouldn’t cause the system to fail, but the system might give me incorrect results). In many cases, it’s a waste of time to discuss, implement, and test some edge cases that is very unlikely to ever happen, but I at least want someone to know if by chance that happens. Now if you’re writing a UI for a website, you might not have the luxury of being able to do this, but when you’re just processing backend files, you can get away with things like this.
Parallel testing against production data
We have a test environment set up with 2 databases – one has 2 day old production data and one has 1 day old production data. We restore these databases from backups every morning and then run in all of the files from 2 days ago into the 2 day old environment, then we compare the results with what’s in the 1 day old database, and theoretically everything should match. There are always exceptions, especially when you have data that was modified by a user after it was created in the database, but this allows me to easily check almost every column on a database table and see that the results from my process match what is currently in production. This has been a huge lifesaver, not only in finding bugs in my process, but for finding unknown scenarios, and for finding bugs in other related processes as well. People have a lot more confidence in your work when you’re able to show tangible proof that your system is working the same as what’s in production.
Writing audit queries that validate the process end to end
In addition to the queries that check for unexpected data, I also have queries that validate that any data received at the beginning of the process will have some resulting output. I need to make sure that the process isn’t silently failing or is failing in a way that I don’t expect.
Hopefully your app logs exceptions somewhere, so as a last resort you should always check for any fallout in the logs.
A different thought process
I find this way of thinking to be a different thought process when it comes to testing. I’m moving past the mechanics of testing (what are my test cases, what tests am I going to write, how can I mock this class, etc.), and trying to find whatever means necessary to not break stuff. Sometimes this is done with automated tests, manual tests, inline sanity checks, writing exploratory code to help me discover scenarios, or some form of production monitoring. The latter three are where I’ve found I’m doing things in a way that I haven’t always done before.
I think the shift in mindset partly comes from owning the responsibility for a feature. At one point a long time ago, I wanted to get my code to work and let QA test it and find bugs. Then I moved to wanting my code to work and wanting to come up with a way to test it. The next step in the progression for me is finding ways to be able to make large changes to the code, not break stuff, and ensure that everything will work with no impact to the business. In each step in the progression, I’m starting to look at the problem at a larger scale and looking at business value and business impact instead of just technical concerns.
One thing I love about software development is that it requires a balance between logical thought and creative thinking. Both are required to be successful, but this is really easy to forget, and it’s the creative side that often gets ignored. I would argue that ignoring the creative side is probably the worst thing that you can do.
When I say that, I’m talking to myself first. As you know, there is often a disconnect between what you believe to be true in your head and how you actually live. I feel like my busy, efficiency-driven life is forcing me in one direction. At work, I’m trying to become more efficient, reduce cycle time, meet deadlines, complete tasks. At home, I’m trying to balance having a family, trying to keep the house from becoming a disaster area, and trying to get enough sleep. Even now as I’m writing this, I know that I could be working and I almost have to tell myself not to. All this leaves little time and energy to be creative. (Proof of this is my drastic decrease in frequency of blog posts over the last year.)
Here’s the problem – it doesn’t really matter if you’re efficient at something if you’re being efficient at the wrong thing. Also, in this fast changing world of technology, what was the right thing yesterday might not be the right thing today. What gets lost when you’re too task-focused is innovation.
We’ve all heard of Google’s famous “20% time” where employees can work on whatever they want. You hear of other startups copying the same idea. This isn’t just another employee perk like free lunches and workout facilities. This is a calculated decision to give people time to innovate, because the company feels that the value of the innovations will far exceed the time spent. Many more established companies are starting to launch “innovation incubators” where they take smart people and let them go off an build innovative stuff without the drag imposed by bureaucracy, meetings, and big-company red tape.
For the rest of us who don’t work at startups or internet companies, innovation may not carry as much value. If you’re maintaining back office internal systems, your tasks are often straight forward and you’re probably not going to come up with a revolutionary idea that will bring in thousands of new customers. But that doesn’t mean that there’s no value in innovation. There are still opportunities to innovate in these work environments, because all software development is a creative endeavor. You still are creating something that will need to meet the needs of the users, and we want to come up with creative ways to do it better, faster, and cheaper.
Developers are strange creatures sometimes. Our quirkiness is often what makes us successful. We may seem to be very structured, logical people who just want to put on their headphones so that we can complete the ticket that we’re working on and move on to the next one. This is true, but developers are also impatient and lazy. We don’t like waiting for our code to compile, we don’t like using frameworks that make things hard to do, and we don’t like writing the same code over and over, and this can drive people to try and come up with creative solutions — if they have room in their head to do it.
I find that if I get overly task-focused, the innovation switch in my head turns off. There is a big difference between “today I’m going to work on X, Y, and Z” and “today I’m going to solve a problem”. One approach has the solution outlined for me, and the other one forces me to innovate. In both cases, a problem is going to get solved, and the solution might be the same either way. The point is that when I go to work with the innovation switch turned on in my head, there exists the potential for something great to happen. It might be completely unrelated to the task at hand, but the value of that innovation could far exceed the value of the everyday task I was working on.
For most companies, it’s not going to make sense to give your employees 20% of their time to work on whatever they want. But there are still things that you can do to encourage innovation.
Pose problems, not solutions
Chances are someone higher up than you in your company is deciding what you’re going to work on. This is good, but I’ve noticed a difference in the way in which these tasks can be handed down. Sometimes I’m given a series of tasks that solves a problem. Other times I’m given a problem and am asked to solve it. I greatly favor have the second approach, for several reasons. First, if I’m given a problem without a solution, I take it as a challenge to come up with a creative way to solve a problem. Second, I’m motivated to solve the problem because I can understand the problem and can see the value that is going to come out of the solution. Third, I just might come up with a more innovative way to solve the problem.
One idea that we introduced at work was the idea of “experimentation time”, where someone can propose something that they want to try out, ask for amount of time to try it, and then go do it and report back the results. This could be anything from trying out a new web framework to refactoring part of our codebase to trying to find ways to run tests in parallel – pretty much anything goes, as long as the goal is to find a way to improve something that we’re working on.
While our IT leadership loved the idea, no one has taken advantage of it yet! I find that interesting because people complain that they don’t have time to innovate but then they don’t actually take the initiative to do it. I’m not working in one of these IT departments with ruthless taskmaster bosses that force unrealistic deadlines on people. I suppose this can be expected from people who typically are focused on getting things done and who are often rewarded and complimented for doing so.
Maybe we should start requiring people to take time to work on something innovative, kind of like how you might be assigned a project in school. Sometimes people don’t feel like they have the freedom to work on something that isn’t working towards meeting a deadline. We practically have to force some people to attend conferences (any other time, people would jump at a chance to take a free trip to a nice destination to learn something and have fun with their co-workers). If we truly value innovation, then we need to find a way to get that message out.
Start with yourself
Time to preach to myself again. How can I sit here and write all this when I’m not giving myself time to innovate and learn? I read this quote today:
Nothing creative will come out of your efforts if you don’t allow your best ideas to incubate. Follow the lead of Warren Buffett and allow time for quiet reading and thinking every day. I recommend devoting at least one hour a day to learning, as Ben Franklin did. Can’t find the time? While you’re commuting or en route to meetings, stay off the phone and listen to a podcast or comtemplate what you’re been reading. You’ll be surprised by what comes out of your brain if you give it a rest sometimes.
–Verne Harnish (Fortune magazine)
The most important things that have happened in my career this year were not because of things I accomplished, but because things I’ve read and heard at conferences, and things I thought about when I was in those spaces when my mind felt clear enough to think about the big picture. Some of these ideas have been career changing for me. Not only that, it reinforces what I’m doing on a day to day basis and gives me motivation to handle the task-based work that consumes most of my day. The challenge is finding the right balance.
People are motivated in many different ways. You can probably think of situations at work where you’ve been really motivated to do awesome things. But what really motivates you if you look beyond the surface?
I’m going to use my current situation as an example. I’m currently doing maintenance on a 6 year old system with a Silverlight front end (and no one uses Silverlight anymore). From a purely technical perspective, it’s not hot new technology, and over the last couple years I’ve watched several developers get sick of doing it. I question whether they are seeing this big picture.
Here’s the thing — the maintenance that we’re doing on our 6 year old Silverlight app is providing a ridiculous amount of business value. I’m able to make changes that have an immediate impact on the users’ ability to do their job, sell new products, and reduce costs.
Are there more “fun” technologies out there? Sure! I play around with things like Ruby on Rails and React on the side because I’m not using them at work and I enjoy working with technologies like that. But my attitude at work depends on my true motivation.
A progression of thought
I’ve spent a lot of time thinking about what motivates me in my career. Am I going to get bored with software development at some point? Are there other roles that I might want to pursue? There are lots of good questions to ask.
I came to the conclusion that I’m not going to get bored with software development because it’s such a big part of our world and the things you can do with technology are too exciting. I’ve also started to understand the underlying reasons that give me motivation.
When I started out in my career, I was like a kid playing with toys. I wanted to do cool things with new technology. I had a limited understanding of what was important to the business, and I was basically just doing whatever work items were in front of me (hopefully with new technology). I had a very small and self-centered view of the world.
Later on, I realized the importance of providing business value. I got into lead roles where I had more interaction with people in the business, and I started to see what was important to them and how technology could solve their problems. I still enjoyed working with new technology, but I started placing more importance on solving business problems. But even at this point, I was missing something very important.
The real underlying motivation for me now is improving people’s lives through software. I want to improve the lives of my users by developing software that makes their job easier and makes them more successful. I want to improve the lives of my managers by helping to solve their biggest problems. I want to provide value to the business and help them achieve their mission. And I want to improve the lives of the people on my team and help us all get that good feeling that you get when you work together with people that you like to achieve something incredible.
It doesn’t really matter what technology I’m using. What really drives me are people. Without people, I’m just typing words on a screen. But when you add people into the mix, I have a much larger purpose then just developing an application. I’m using technology to change people’s lives. And that is a good reason to get up in the morning.
When I think about a lot of the efforts that we make to improve the software development process, I feel like we’re usually trying to make improvements within the system that we are currently living in. What if we could instead disrupt the world that we’re living in by changing something that dramatically changes the game?
Think of what Uber has done. I feel like everyone uses Uber. How many people do you know used taxis on a regular basis? Maybe you used a taxi when you absolutely had to, like when you’re getting from an airport to a hotel. But on a daily basis? No way. The other day a co-worker took an Uber to get to work after dropping his car off to get an oil change. When I asked him how he was going to get back to pick up his car, he said, “I’ll figure it out this afternoon.” That is a game changing idea. It makes you think about transportation in a way that you never thought of before.
Let’s think about the world of software development. I tried to think of some of the big changes I’ve seen in the last few years.
- DevOps and cloud computing – it used to take weeks to get a new server purchased and stood up, but now we can go to a site that automatically provisions a server, installs what I need, and then I can get rid of the server as soon as I’m done with it at a fraction of the cost.
- Git – I remember the first time I heard about branching per feature. In the world of centralized version control systems, branching and merging is hard enough that you would never think about branching per feature. Git makes the cost of branching and merging almost zero, which enables you to work in a completely different way.
- Dynamic languages – I can change a line of code and see the results immediately without having to compile
- Remote working – collaboration tools are improving to make it much easier to work with people that aren’t in the same location as you
Think about the application that you work on and business in which you operate. What are some things that are annoying and slow you down? Some of these things are obvious, but many are really hard to see because they’ve just become “normal” to you. You’ve accepted those things as facts. But what if there were a way to change the facts?
Let me give you some examples.
- What would happen if I didn’t have to wait so long to get answers from people in the business?
- What would happen if I had a faster development laptop?
- What would happen if we were using a different framework/platform/language?
- What would happen if our team could all sit together in the same space?
Those are good questions to ask, and those things might provide a lot of value, but that’s still operating within your current plane of thought. What if we ask more mind-blowing questions?
- What will happen when we improve smartphone battery life so that a phone can operate on a full charge for weeks/months?
- What will happen when computing and network speed increases so that web pages load instantaneously?
- What could you do if everyone had virtually unlimited data and download speeds were measured in gigabytes per second?
- What will happen when mainstream video chat is no longer a grainy, choppy FaceTime or Hangouts video and instead is a clear 4k data stream?
- What will you be able to build if all of these were true?
Will those things help you out today? No, because they mostly aren’t a reality yet. That’s not the point. By thinking about game-changing ideas, it forces you to think on another level. It forces you to think outside the box. It’s surprisingly hard to think outside the limitations of the world in which we live everyday (remember The Matrix?).
This is why I attend certain software development conferences and not others. For example, I’m writing this at the Path to Agility conference. I love going to open space conferences for the same reason.
I go to conferences like #path16 not just to hear mind-blowing ideas, but to hear things to make me think about mind-blowing ideas.
— Jon Kruger (@JonKruger) May 26, 2016
The technology world is changing at an extremely rapid pace, so we’re going to need to change the level of our thinking.
I have 1,408 emails to answer now–prioritizing is important. The younger generation is constantly looking at their phones, so they don’t have time to think strategically.
– Cheryl Krueger, founder of Cheryl & Co.
In a world where we seem to value busy-ness, I feel like we frequently got lost because we don’t often take time to think about where we’re going. I’ve fallen into this trap many times.
Every time this happens to me, I eventually work my way out of the insanity and then wonder what happened that got me so busy in the first place. The thing is I’m almost always bringing it on myself. It’s not like someone’s working me into the ground or anything, I’m just not taking time for downtime.
Not only is over-working yourself tiring, it’s a huge mistake. I find that when I’m constantly consumed by doing things and getting things done, I have no time to think strategically. Some of my best ideas come to me because I my mind is clear and I give myself time and space to think.
My wife loves to give me a hard time for not reading books. I’m not much a fiction reader, I can’t remember the last time I read a fiction book (it’s probably been since college!). Most of my reading these days is related to technology and business, which some would say is not light reading.
I find it inspirational. I love reading about what people are learning and how people are using technology to change how we do things. We live in an amazing time when anyone with a good idea can turn it into something that changes the world. I’m probably not going to be that guy, but I like being reminded that anything’s possible.
I’ve been burned out on conferences for the last couple years. I’ve stopped attending several conferences and user groups that I used to attend on a regular basis. I’m not someone who typically likes to sit in one place and listen to someone talk for an hour, especially when it’s a topic where I could spend 20 minutes reading on the internet and get all of the same information.
I still go to some conferences, but I don’t go planning to learn anything specific. I go because it gives me a space to process ideas and think clearly. I go to talks just to give my mind a trigger for my thoughts. I love talking to people at conferences to hear the ideas that are floating around in their heads.
Free thinking at work
This is a tough one. When I’m at work, I’m putting a lot of effort into focusing on a specific task. I’ll put headphones on so that I can focus on writing a certain piece of code. When we’re in meetings, we try to have a very focused agenda. Everything is focused on completing tasks. So what can you do to promote free thinking at work?
We’ve started doing book clubs at work to promote learning. Some of these are technology focused, some are focused on business acumen. A lot of good conversations happen at the bar after work when people are more inclined to open up about what’s going on in their lives. It’s not that we come up with amazing ideas during these times, but it clears a little space in our head for thoughts to come in.
This is important
I’m starting to make a conscious effort to find ways to stimulate thinking. When I find myself with extra free time, I’m not trying to find projects to fill that time. I’m reading less about “how to use technology X” and I’m starting to read things that will expand my horizons.
What works best for you? That’s up to you to find out, but make sure you’re giving your mind some space to find it.
I find that as software developers, we sometimes lose sight of what it is like to be a user of the systems that we develop. This is ironic since software developers probably consume more software than the average user.
For the apps and systems that I use, I have two very high level yet very important requirements for updates to the application:
- 1. Works as designed (i.e. not buggy, doesn’t crash, etc.)
- 2. Is at least as fast and easy to use as the last version (hopefully faster, but definitely not slower)
Taking the pain
It’s been a rough week for me, mostly due to the fact that we decided to upgrade our solution from Visual Studio 2012/ReSharper 7 to Visual Studio 2015/ReSharper 10. At first, I got excited when I typed “?.” for the first time, but the excitement quickly faded.
- Everything in the IDE felt slower
- Visual Studio would often chew up 60%+ CPU on all cores, even when it seemed like nothing was happening
- ReSharper wouldn’t show me the results of my tests until ALL THE TESTS were done running
- The ReSharper test runner would die a slow death and crash if I ran a lot of tests
- If I open a solution that has a Git repository, I can’t connect to TFS to open work items in the same solution
All of this made me long for the good old days of VS2012 and a version of ReSharper that worked (not to mention that we gave these companies money for these new versions!).
Don’t get me wrong, these newer versions have a lot more features than the old versions. The problem is, I don’t use 90% of them, and they failed to meet my two most important requirements that I mentioned.
I can see how this happens.
Executive: “We need features X and Y so that we can release a new version and sell software!”
Dev team: “But we don’t have enough time to do that well.”
Executive: “That’s OK, just ship it anyway, they’ll purchase it and then we’ll fix the issues.”
In my case, they’re going to get away with it because I don’t have an alternative to Visual Studio and ReSharper right now. But it still feels wrong.
Running through mud
Another example: Why does every new version of an operating system have to get slower? I have a 5 year old MacBook Pro that I had to upgrade from Snow Leopard (which was working great, BTW) to El Capitan because no one was supporting Snow Leopard anymore. Now my MBP feels 5 years old and it’s much slower.
If you’re a Linux person, you’re probably laughing at everything that I’m saying because everything for you is lightning fast with the command line, simple user interfaces, etc. When I was last doing Ruby, we used gVim as our IDE (basically a simple text editor with basic highlighting, basic autocomplete, tabbed windows, and of course the power of Vim). Contrast that with the bloat of Visual Studio.
The opposite experience
This morning, I got the Android Marshmallow update for my LG G4. When I read up on Android Marshmallow, the general sentiment out there seemed to be, “There’s nothing big in this release, just some minor features, increased performance, and better battery life.”
What!!!! I’ve only had Marshmallow for about 4 hours, but I can tell that it’s a little snappier than before. They made minor usability changes in the OS that are nice. I can’t speak for the battery life after just 4 hours, but it doesn’t seem to be any worse than before from what I can tell.
What a breath of fresh air. I don’t have to sacrifice performance for unnecessary feature bloat. I don’t have to buy a new phone to make the latest OS work as designed (right, older iPhone users?). All this makes me a happy user.
You do this to people too
What do your users have to say about the updates you release? Sure, you’re going to have the curmudgeons that don’t like any change, and you can’t please everyone. But too often we ignore the non-functional requirements like performance, usability, and user happiness. Those things might just be more important to your users than those new shiny features you’re working on.
What happens when a user of your application makes a mistake that has negative repercussions? Let’s say this was not a conscious mistake or an act of negligence, it was just an accident, a simple typo, or clicking the wrong button. Whose fault is it?
Is it the user’s fault for being too careless? Is it the developer’s fault for designing a system that doesn’t protect against such mistakes?
What if we’re asking the wrong questions?
This happened to me recently and a light bulb went off in my head. The reason I was asking the wrong questions was due to the way I was viewing my relationship with the users of my application.
Go read those two questions again.
Is it the user’s fault for being too careless? Is it the developer’s fault for designing a system that doesn’t protect against such mistakes?
The key word is fault. We get so obsessed about figuring out who is responsible for a mistake. What if my mistake was not expecting fallible people to make mistakes?
We say things like, “It’s the users’ job to make sure the data is correct.” Maybe it’s their primary responsibility to make sure the data is correct. But when the data is wrong, IT ends us getting partially blamed.
He’s the crux of the matter – you and your users are on the same team. This changes everything.
Everyone is responsible for quality, whether that’s the quality of the code, the way that the system is used, or how people consume the data downstream. This doesn’t mean that it’s all on you, but as a member of a software development team, you are a part of the process.
With that being said, what can you do to ensure that the system is used correctly? You could build checks into the system, write audits to check for issues, educate users on how to use the system better, and be aware of how changes to the application might affect people that use it or consume the data. More importantly, you care about all of these things and don’t dismiss things as someone else’s problem.
Care about what your users care about
You know that feeling you get when the smartphone app that you love releases a new version with a fancy UI redesign, more features, and promises of rainbows and unicorns, yet you hate it because it’s slower and the new features make it harder to use it in the way you like? This happens to me all the time!
That’s probably how your users have felt more than a few times. You probably didn’t mean to do it. But it probably happened because you didn’t know the repercussions of your design decisions.
I just spent two months being a user of my application. Not as a tester or a coder, I joined the users’ team. I sat on their floor, I went to their meetings, I did their job along with them. Now I often used SQL to solve problems, but I lived their life and watched how they did things. I had several moments where I groaned because I had to wait for the next release for something to be fixed, and I realized there are many situations where the system doesn’t allow a user to do something the “right” way and they have to find less than optimal ways to get their job done. I saw them spend days doing mind numbingly boring repetitive tasks because IT didn’t have time to help them.
The reason I ended up joining the users’ team is that we wanted to break down the walls that caused all of these inefficiencies. Many of you have had the aha moment when your developers and testers start communicating and owning quality together and you are able to drastically streamline the software development process. We applied to same principle of working together to drastically streamline the business process as well. And along the way, it shifted my mindset as well.
I’m not there yet, but I’m starting to get a better grasp (maybe even a good grasp) of what my users care about. I’m not sitting with them doing their work anymore, but now I go up and ask them a lot more questions, we’re doing more training and user acceptance testing, and I can relate when they have struggles. But even more importantly, the users are starting to realize that I get it.
Prioritize your users
One thing that surprised me when I sat with the users is how many system issues they knew about that I had no idea existed. “Why didn’t they just tell us?”, I would think. Sometimes they would create tickets for us to fix them, sometimes they might send an email, but the tickets often got lost in the backlog and the issues wouldn’t get resolved. So they just stopped telling anyone about the issues because they felt that no one was listening.
How frustrating! Believe me, in IT we were getting A LOT done. But we weren’t prioritizing our users, and they didn’t think they could count on us.
The other day, I got an email from one of the users explaining some problems they were having. I was ecstatic! They took the time to write that email because they actually think that it might do some good.
I can’t always drop everything to cater to their every whim, but we need a process that will allow users to raise issues and get them resolved. What’s the point of releasing all kinds of new functionality if the existing functionality isn’t sufficient?
I’m hoping to be much more available to the users so that they see me as someone that they can count on. That doesn’t mean just waiting for them to raise issues, but also proactively trying to find issues, show them how they can use the system better, and even volunteering to assist when I see a way that we can use technology to help them do their jobs.
Every business cares about making money and reducing costs. Yet every day I press a button and sit idly while I watch a little progress bar move. This happens every time I want to run an application or run a test.
Compiling code is something we’ve just gotten used to. Maybe that’s not the right phrase — we’ve learned how to put up with it. Granted, things are a lot better than they used to be. My first job after college was working on a C++ application where changing some of the foundational header files meant 30 minutes of compiling just to rebuild the application!
When .NET came out, they said that it compiled so fast that you would wonder if it actually did anything. That was true on demo apps that only had a few source files, but as your application grows and grows over time, those compilation times are quite noticeable. Certainly it was better than it was in C++, but that only makes you feel good for so long.
How much is compiling costing you? I decided to find out. The application that I’m in is 5 years old and has a fairly sizable codebase. Rebuilding the entire solution takes about 2 minutes, but usually I don’t need to rebuild everything. If I change a test file and run the tests, it still takes 30 seconds to compile what it needs to run the test. My machine is a year or two old, but it’s a pretty solid development machine with plenty of RAM and everything running on SSD. Your codebase may be smaller (or larger) than mine, so the compile times will vary. If you codebase is smaller because you app is younger, think about what it might be when your app is 5 years old.
There is a Visual Studio extension called Build Monitor that will record the compilation time every time you compile and then dump it to a json file. We all installed this and we recorded compile times from several different developers over a couple weeks, and here’s how it came out:
99 hours of dev time
5.4 hours spent compiling
… which means that 5.45% of our time was spent waiting for the code to compile.
Let’s put this in perspective:
If I code for 8 hours, I lose 26 minutes to compiling each day.
If I code 6 hours a day on a 6 month project, I lose a whole week to compiling.
Spread that across your entire team and multiply that by the average hourly rate of your employees.
5 days lost x 6 hours of coding time per day x 5 devs x $60/hr = $9,000
That’s real money!
Note that we haven’t taken into account that I can’t take advantage of my tests as much when the cost to run them is higher, so I’ll write a bunch of code before I run the tests, which makes diagnosing problems harder.
We also aren’t taking into account the slowdown that comes from having to stop for 30 seconds and go find something else to do like check email while I wait.
We also aren’t taking into account the lost business value because we can’t deliver features faster.
We also aren’t taking into account that someone out there is writing code that is trying to take away your market share, and if they can do it faster than you, they have an advantage.
What can we do about this?
Here are some things you can try to reduce compile times.
Get an SSD
There’s absolutely no reason why you should not be using a solid state drive at this point. When I switched to an SSD, my code compiled 3 times faster. You can get a 128GB SSD on Amazon for under $50. If your company won’t buy one for you, buy it yourself.
Get a faster machine
A new machine isn’t as cheap as an SSD, but if you can get a faster machine and speed up compilation time, the machine is going to pay for itself very quickly. At least make sure that your current machine isn’t strapped for RAM (which is really cheap).
Check your build settings
Once you download your nuget packages, you don’t need to check for them on every build! I like to leave this box unchecked.
Make sure the number of parallel project builds matches the number of threads your machine can run at one time. Also, when you run your code, you should only be building the projects that you need to run the code.
Split up your solution
If your solution contains a bunch of projects that you don’t ever edit, they’re just taking up memory and compile time. I like having one solution that has everything, but it can’t hurt to make smaller solutions that only have subsets of the code that you need in certain circumstances.
If you don’t split up your big solution, you can unload projects by right-clicking on the project in the Solution Explorer and selecting Unload Project. This will essentially remove the project from the solution that you have open without actually removing it (unloading is a user-level thing, so you can unload what you want without affecting your other team members).
I see lots of solutions where there’s a project for the data layer, a project for the business layer, a web project, and many more. The problem with this approach is that every time you compile, it has to copy .DLLs around to all of those different bin\debug folders, which takes time.
I would recommend consolidating projects whenever you can. Yeah, this might allow someone to reference the data layer from a controller instead of going through the business layer, but we all should know what you should or shouldn’t do in a codebase without having to have project boundaries enforcing it.
There is one caveat here… if you consolidate projects, then you can’t unload them anymore and you’ll have to compile them all the time. So while you might save time by consolidating projects, in some cases you could increase people’s compile time because you force them to compile code that they might otherwise unload.
Rethink your language choice
(Yes, I know there’s a free version of Visual Studio, but how many of you are using that at work?)
I did Ruby on Rails for a year, and not only was it nice to not have to compile, I just loved the language. You really can do a lot more with less code. I felt like someone took off the training wheels and I could just write code that did what I wanted to do without all of the ceremony.
I realize that it doesn’t make sense for most teams to rewrite an existing codebase in another language just to avoid compilation. However, I will say this – someone else is competing against your company, and by using another language, they could have a 5% (or more) advantage. Ruby on Rails is very widely used by startups, and no one is more pressed for time and money than a startup.
I’m sure there are reasons that .NET can’t become an interpreted language like Ruby, but why can’t it? You can already make dynamic method calls in .NET using reflection, and at runtime it will attempt to call the method that you specified and will throw an exception if it can’t find the method. So why can’t everything work that way? Compilation may still have value as a sort of test to make sure that everything does link up, and it probably makes runtime faster if I can compile my code before I deploy it. But the real win will come when I can write .NET code and run it without having to check every method call and check every line for syntax errors when I’m only going to execute a few lines of code in a test.
Yeah, I know, now there’s ASP.NET Dynamic Compilation, but when I read about it, it just sounds like moving the slow compilation to the web server, which is convenient but isn’t going to save a lot of time when developing from what I can tell. But I haven’t actually tried it, so I suppose I could be wrong (I hope I am).
What else am I missing?
Do you have any ideas, tips, or tricks for how you’ve reduced compilation time on your team? I’d love to hear your thoughts! We’re all tired of watching progress bars.
This post is a part of a series of posts about iteration management. If you want to start from the beginning, go here.
Iteration management tends to be very fast paced. I find this exciting, but at first it feels a little overwhelming. Several different analogies come to mind.
In the NFL, quarterbacks that come in to the league from college often have a hard time adjusting the pace of the pro game as opposed to what they were used to in college. Early on they tend to struggle, but as they get more experience, the game starts to “slow down” as they get used to the pace and they start to have more success.
When you try to ride waves in the ocean, you wait for the wave to come and then you start swimming as fast as you can with the wave to try and catch it. If you go too late, the wave will pass you by. If you go too early, the wave may pick you up, slam you into the ocean floor, and churn you around like you’re in a washing machine. But if you get it just right, it’s an exhilarating ride.
When you’re leading a team, there’s a lot to keep track of. You have to be able to juggle multiple things at one time, and things can get out of control very quickly. The trick is to try and keep everything in front of you, and as soon as you see things getting out of control, come up with a plan to address the issues and get things back on track.
If I had to boil all of the Agile practices and ideas down to one sentence, it would be this: Do more of what works, and less of what doesn’t. I don’t care if you do things “by the book” or not. All that matters is that you find the best way to be successful and keep trying to get better.
I think of Agile as a giant toolbox of practices, principles, and ideas that I can draw from to help me with whatever situation I’m dealing with. I follow many practices that are associated with agile methodologies, but most of the time I don’t think of our process as “doing Agile” anymore. Most people would say that we are “doing Agile”, but we’re just trying to apply common sense and creative thinking to find better ways to develop software.
I’m constantly trying to find new ways to improve the software development process. I hope that this series of blog posts have given you some good ideas for your toolbox that you can use to help your team be more successful.
This post is a part of a series of posts about iteration management. If you want to start from the beginning, go here.
If I could pick one thing that will most impact whether your project will be successful, it would be how well you work with your stakeholders. I don’t know how many times I’ve heard people say that they key to their team’s success is the involvement of a good product owner from the business. As an iteration manager, your responsibilities might include working with stakeholders to involve them in the process.
When I refer to a “product owner”, I’m talking about one person in the business who is the primary person to make decisions about the project. While you will likely get input from many people in the business, the product owner is the go-to person who will make decisions when people disagree and make sure that you are getting the information that you need.
What happens when you don’t have a good product owner? Any number of things.
- Getting behind because you’re waiting for answers
- Lack of detailed requirements
- Lots of requirements changes due to people changing their mind
- Getting conflicting messages from people in the business
That’s not to say that you won’t be successful if you don’t have a good product owner, but if you don’t have one, there are a lot more things that can go wrong.
Here’s what I tell management when we don’t have a defined product owner: requirements have to come from somewhere, and someone needs to answer questions, fill in the details, and settle disputes. That can either be someone in the business who has the knowledge and ability to make those decisions, or it can be people on the development team. I don’t know that you always want developers making decisions about how things should work, and I don’t think developers really want to do that either.
Often times I’ve seen a BA end up being the de facto product owner. If you have a good BA that really understands the business, this is probably your best choice if you can’t get someone from the business to step up. It’s still a risk that should be monitored and mentioned to the people who are paying for the project. You can write the best application in the world, but if you build the wrong thing, it was all a waste of time.
If you’re working within the context of iterations, you’ll want to meet with people in the business before the iteration starts so that you can discuss the project and let them decide what you should work on. This is also a good time to ask clarification questions and make sure that you have everything that you’re going to need to do the next iteration’s work.
How you do this is up to you. Maybe you have a scheduled meeting before the iteration, or maybe you have a backlog of tickets that the business keeps prioritized. It really helps if you’ve estimated the work before you do this exercise so that everyone understands how what each feature is going to cost. Maybe they asked for something but when they realize how hard it is, they might decide that it’s not worth it anymore.
Even if you’re on a project where all or most of the work was scoped out before the project started, it’s still a good idea to have this meeting. Things are always changing, so the business might have different priorities now than they did a few months ago.
By letting your stakeholders choose what you work on, it involves them in the process and lets them have some skin in the game. If you’re not involving the stakeholders on a regular basis, they might assume that everything is going great when in reality the project might have all kinds of problems. At some point those problems are going to surface, and the sooner you can make people aware of them, the sooner you can work together on a solution to get things back on track.
Handling changes within the iteration
Even if you have short iterations, things are going to come up during the iteration and the business might want to change things mid-iteration. Some teams might find this annoying. I find it necessary. Successful businesses able to adapt quickly and respond to change quickly, but if IT is unable to keep up with the changes, then IT is keeping the business from being successful.
That’s why I welcome people asking if they can bring something new into the iteration – provided that they take an equal amount of work out and that they understand the impact of the change of focus (for example, if they want to remove something that is already half done, they should understand the impact of having the development team stop working on that feature). One of the reasons I like having a physical board instead of an online tool is that it’s much easier for business people to do this because they can just come over on their own and see what’s available to swap out for new work.
I love seeing this happen because it means that people in the business get it. I love when they come over and say, “We have this issue that just came up, can we swap out these two tickets for this new one?” I’m sure they love being able to have that level of control, and the development team can adapt to the change without having to get slammed with extra work.
Demos/user acceptance testing
Towards the end of the iteration, take some time to do a demo for your stakeholders and show them what you’ve been working on. This lets them know what you’ve been up to, and it also gives you (and them) a chance to make sure that you built the right thing. Maybe you even have some users try out the new functionality see if they’re able to do what they need to do. This feedback is essential because it’s so important that we build the right thing and that we build something is going to make the users’ life better.
How many times have you had an app on your phone that you really liked, but then a major update was released with UI changes that made the experience worse? I’ve had this happen multiple times with apps that I liked, and most times it led me to uninstall the updates or switch to another app altogether. You don’t want to do this to your users. It’s not about you or building what you want to build, it’s about what they want and what they need to do their job.
This stuff is important!
Your user base is hopefully very interested in seeing your project succeed, and if you can develop a good working relationship with people in the business, everyone will be happy in the end.
My current project has a very strong project owner. She is very involved in the process and is very in tune with everything that is going on, both on her team and the development team. She’s always willing to make decisions when the development team has questions and actively manages the backlog of work for future iterations. As a result, we’re able to get a lot of work done, and the users have been very happy with the outcome, and that might just be the most important part.
Read the next post in this series, Keeping up.
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