fishfacegit/file-manager
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Ship a baseline profile, generated on the emulator because the phone cannot collect one

Browse Source 
The profile is real: 13193 lines in app/src/main/baseline-prof.txt, 584 of them the app's own classes, bundled into the release APK as assets/dexopt/baseline.prof. It is produced by a new :baselineprofile test module that walks the first journey - roots screen, one volume opened - under the androidx.baselineprofile plugin, and :app now depends on androidx.profileinstaller so the bundled profile is applied at install time.

Two device facts decided how it was made. Collection requires API 33+ (BaselineProfileRule refuses Android 12 outright), so it ran on the API 35 AVD that was already in ~/.android/avd; that emulator is software-rendered and needs androidx.benchmark.suppressErrors=EMULATOR for any macrobenchmark. And the release build needed profileable android:shell=true, which is why app/src/release/AndroidManifest.xml exists and says why: the same APK is both the thing measured and the thing shipped, so the profile's class names are the ones in the shipped dex.

The effect is not measured, and PERFORMANCE.md says so: 7404 ms median without the profile against 9005 ms with it, run to run, because a TCG emulator varies by more than a profile can buy. What remains is one run on a physical API 33+ phone, with the two compile commands documented. The emulator did settle the other open question - FrameTimingMetric there reports frameDurationCpuMs and frameOverrunMs, the metrics this phone cannot produce at all.

:baselineprofile is compiled by tools/verify.sh --release like :benchmark, so it cannot rot between device runs.
This commit is contained in:
Hadrian Burkhardt
2026-10-17 17:06:08 +02:00
parent 0a3ff88247
commit 4846454645
12 changed files with 13377 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/verify.sh
+4 -2
View File
@@ -48,8 +48,10 @@ if $release; then
step "Benchmark APKs compile"
# No device: this only proves that :benchmark still compiles against the app's benchmark build
# type, which is the thing that rots silently between device runs.
gradle :app:assembleBenchmark :benchmark:assembleDebug
# type, which is the thing that rots silently between device runs. :baselineprofile is included for
# the same reason — its generator only runs on a device with API 33+, so nothing else would notice it
# breaking.
gradle :app:assembleBenchmark :benchmark:assembleDebug :baselineprofile:assembleBenchmark
fi
printf '\n\033[1mverify: all checks passed\033[0m\n'