Building Swift Code Faster

[giscus[bot]]

Building Swift Code Faster

How do you speed up the build of your Swift project? Do you use -warn-long-function-bodies or maybe even -stats-output-dir? These can find some compilation performance issues, but how do you truly take your build times to the next level? In this article, I want to show you how tweaking some build settings can drastically speed up your clean build times.

https://abdulowork.github.io/Building-Swift-Code-Faster/

[beefon]

Thanks, great article! I liked your approach of combining WMO with incremental build modes for 'monolithic' module. But how do you define a monolithic module? What are its features?

[timofeys1]

One way to identify a monolithic module is to look at its clients. The module is most likely monolithic if it is large enough and each of its clients uses a small percentage of the API offered by the module.

Another way is probably to look at how cohesive a module is. If the module consists of a bunch of code that is not cohesive at the implementation level, then the module is likely a monolith.

[artyom-razinov]

Good article. I'd like to add that we at Avito are looking forward to do something with huge modules described here as monolithic. Optimization is great, it helps us now, but we won't stop here. Ideally we should achieve maximal parallelization of building modules. My message for viewers is that you probably should seek the same goal too if you want to do something like we did, avoid modules that behave like those "monolithic" modules at compilation, big modules that do to much, have too much dependencies and too much modules depend on them.