tree 8adb356ac30fed16021ac5da40bb22a6b6af1fcb
parent a451505922cef7fbc7421247d5e2df661c328d1e
author Jakub Gielzak <jgielzak@google.com> 1651068839 +0100
committer Jakub Gielzak <jgielzak@google.com> 1651682399 +0000

New library compose:runtime:runtime-tracing

When added as a dependency to a Compose application, enables
recomposition tracing:
- declares a dependency on tracing-perfetto
- registers tracing-perfetto with Compose

Remaining steps to trace have to be performed by tooling (e.g. Android
Studio Profiler):
- provide tracing-perfetto-binary dependencies required for tracing
- notify the app to register with Perfetto SDK (using
  androidx.tracing.perfetto.TracingReceiver)
- include track_event as a category in its Perfetto capture config
- capture and present a Perfetto trace

End-to-end test covered by TracingInitializerTest where Macrobenchmark
performs the steps described in the previous paragraph.

Bug: 214560409
Bug: 214560414
Bug: 214562374
Test: ./gradlew :compose:runtime:runtime-tracing:connectedCheck -Pandroid.testInstrumentationRunnerArguments.class=androidx.compose.runtime.tracing.test.TracingInitializerTest
Test: ./gradlew :compose:integration-tests:macrobenchmark-target:installRelease && ./gradlew :compose:integration-tests:macrobenchmark:connectedCheck -Pandroid.testInstrumentationRunnerArguments.class=androidx.compose.integration.macrobenchmark.TrivialTracingBenchmark

Change-Id: Id1ea30fdea39da8d63b8c0963d9e8e351704985b