Faster C++ iterative builds with GitHub Copilot

This article discusses the new iterative build tool in GitHub Copilot that helps optimize C++ project build times by measuring the impact of changes on both clean and iterative builds. It highlights the importance of understanding how changes affect everyday incremental builds.

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Slow builds are a consistent theme of feedback from C++ developers. We built GitHub Copilot build performance for Windows so you can leverage Copilot to optimize your project’s build times. This workflow will find optimizations that bring your build times down.

At first, we only measured the impact of build optimizations on full clean builds. While that number is valuable, we know that you are not rebuilding from scratch on most days. You edit a file and build, then repeat the process as part of your iterative loop.

Working with customers after the public preview, we noticed that every now and then, the agent proposed a change that made the clean build slightly slower. On its own, that suggestion may look like a regression you would reject. After further investigation, we learned that…

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