Android baseline profile capture and apply

Baseline profiles give Android apps a 20-40% faster cold start and 15-25% faster initial frame in production as of 2026. Since Android 14, dexopt is handled by ART Service per-architecture; the RISC-V backend uses the same mechanism.

Capture flow (per app)

gradle :app:generateBaselineProfile
  -> Macrobenchmark runs a representative cold-start scenario.
  -> Profileinstaller writes baseline-prof.txt.
  -> Apk ships baseline-prof.txt under assets/dexopt/baseline.prof.

compiler/baseline-profiles/capture.sh wraps the Macrobenchmark invocation against the Cuttlefish RISC-V image (BLOCKED on AOSP RISC-V branch SHA pin per android-rva23-prebuilts.md).

Apply flow

ART Service consumes the baseline.prof shipped in the apk. The bg-dexopt-job JobScheduler entry rewrites the on-device profile after first run.

Status

• Recipe documented.
• End-to-end capture BLOCKED on AOSP RISC-V Cuttlefish image plus androidx.benchmark library RISC-V support.

Evidence gate

docs/evidence/compiler/baseline-profile-evidence.yaml.