![]() Gains will obviously depend on how your code is written, but it is worth testing since parallelized builds aren’t enabled by default. For projects with many smaller dependencies that can easily be run in parallel, this can offer significant time savings. Parallelized builds can reduce total Xcode build times by building components of the app that do not depend on each other at the same time. You can find configuration instructions here: Adjusting the Xcode iPhone simulator scale and size Use parallelized builds: These configuration changes use less resources and help prevent tests from slowing down simulating pixels that no one will ever see. By using Physical Size or Pixel Accurate window sizes, you can reduce both the size of your tests and the time it takes for them to complete. The Apple iOS test simulator lets you test across different software and hardware combinations (but only from a Mac). Keep in mind that you may need to experiment to determine if there are diminishing returns for parallelized builds with your code base, and then adjust the thread count accordingly. This takes advantage of some processors’ ability to multi-thread or simulate additional cores. However, you can dramatically reduce build times – in some instances by a full 30% - by increasing the thread count beyond the default. ![]() Your script’s output files are missing.īy default, Xcode typically uses the same number of threads as the number of cores in the machine’s CPU.Your script doesn’t have any output files.Your script doesn’t have any input files.To control when custom scripts are executed during the build process, you will need to provide at least one input and one output file for each script, as Xcode will execute each script that meets any of these conditions: This may not be needed if your custom scripts are performing actions like setting environment variables for the build or other preparatory steps for the larger build process. To view the Build Timeline for a particular target in your project, right click on the target and select “View in Timeline.” Only run custom scripts when needed:īy default, Xcode will run any custom build scripts included in your project during every build – including incremental builds. Xcode’s new Build Timeline feature will help you to identify which portions of your application are building in parallel, and whether there are any unnecessary steps in the build process that are slowing things down within a particular portion of the build. Xcode 14 allows developers to easily measure their iOS and macOS build times in order to identify potential bottlenecks, and to allow for easier optimization for faster builds. ![]() Measure the build time of each element in your project: While many of the same principles apply to speeding up Xcode builds, Xcode 14 tackles the problem of slow builds head on with a variety of new features. UPDATE: This post has been updated to reflect changes in Xcode 14. However, there are several tweaks you can make to Xcode that can decrease the amount of time it takes for builds to complete without any extra work. As projects grow, build times can become problematic.
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