Android Baseline Profiles and Macrobenchmark in 2026

Deep dive into how Baseline Profiles actually work under the hood — AOT compilation via cloud profiles vs on-device profile-guided optimization, how dex layout optimization interacts with ART's JIT/AOT pipeline, measuring real-world cold start improvements with Macrobenchmark, and the common mistakes that make your profiles useless (stale rules, missing critical user journeys, profileinstaller version mismatches). Includes concrete before/after numbers and the profiling workflow that catches regressions in CI.