Embracing 16 KB Page Sizes in Android
summary
Android 15 introduces 16 KB page sizes and apps with native .so files must be rebuilt or risk crashes; rebuilding means updating to Gradle plugin 8.5.1+, adding the CMake/NDK flag for flexible page sizes, and rerunning APK Analyzer plus Google's alignment script to find incompatible libs (example: libjingle/WebRTC). Expect ~4x fewer page faults, ~1s faster boot and up to 17–30% faster app launch (measured examples), at the cost of ~9% more RAM; test on emulator or a wiped Pixel with the dev toggle enabled.
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chapters (9)
- 0:00Introduction
- 1:49What are page sizes and why they matter
- 8:05Memory pages and page tables
- 14:28Native code impact on page sizes
- 17:40Checking app compatibility
- 23:24Fixing native dependencies
- 30:48Testing with 16 KB pages
- 34:22Real-world experience
- 37:16Summary
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