Enable compilation caching and eager linking for faster builds#5740
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AvdLee wants to merge 1 commit intowikimedia:mainfrom
Open
Enable compilation caching and eager linking for faster builds#5740AvdLee wants to merge 1 commit intowikimedia:mainfrom
AvdLee wants to merge 1 commit intowikimedia:mainfrom
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Enable recommended Xcode build settings to improve build performance: - COMPILATION_CACHING = YES (Debug + Release): caches compilation results so repeated builds of unchanged sources are served from cache. Benefits branch switching, pulling changes, and CI builds. - EAGER_LINKING = YES (Debug): allows the linker to start before all compilation tasks finish, reducing wall-clock build time. Benchmark (Xcode 26.2, Apple Silicon, 1,154 Swift files): - Clean build: 48.7s → 46.5s - Cached clean: 45.0s (warm compilation cache) - Zero-change: 12.9s → 12.2s
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Summary
This PR enables recommended Xcode build settings to improve build performance for the Wikipedia iOS app.
Changes
COMPILATION_CACHING = YES(Debug + Release): Caches compilation results so repeated builds of unchanged sources are served from cache. The biggest wins come from branch switching, pulling changes, and CI builds where many files remain unchanged between builds.EAGER_LINKING = YES(Debug): Allows the linker to start work before all compilation tasks finish, reducing wall-clock build time during development.Benchmark (Xcode 26.2, Apple Silicon, 1,154 Swift files)
How these were found
Analysis was performed using Xcode Build Optimization Agent Skills (note: still private, will be available soon. Happy to invite!), which benchmarks builds, audits project settings against best practices, and identifies optimization opportunities.
Test plan
xcodebuild -showBuildSettings