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Technical Blog Post
Summary
The article explains a hidden macOS setting that disables XProtect scans of newly built executables, dramatically speeding up Rust Cargo builds and test runs. By toggling the Terminal option in System Settings, developers can cut build‑time minutes into seconds, with similar gains expected for other compiled languages.
Highlights
- macOS XProtect scans each new executable on first launch, adding significant latency to Cargo builds and tests.
- Disabling the Terminal option in System Settings turns off these scans, reducing Rust build times by up to 70%.
- Measured Rust UI test suite time dropped from 9m42s to 3m33s after applying the workaround.
- The performance boost is likely for any compiled language (C, C++, Go, Swift) and even interpreted pipelines that produce binaries.
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Context
Audience
Software engineers and DevOps professionals who compile code on macOS and want faster build cycles
DomainSoftware Development
Formatlong-form article
Accessfree online
Personal Notes
Applies to any compiled language, including Java, TypeScript, and Go (though in Java and TypeScript it only seems most sensitive to large amounts of package dependencies and tests and frequent iterations)
Topics
Related
Apple Developer Documentation on XProtectCargo documentation for build scriptsRust language performance guidesmacOS System Settings manual