Android Performance.

Baseline profiles, R8, Macrobenchmark, Perfetto, startup time and ANR triage. Covers 8 topics.

• Android Performance · 1 of 3

  App Startup Time

  Which platform call lets an app announce that its startup content has finished loading?

  AonPostResume() on the Activity baseBonEnterAnimationComplete() on ActivityCreportFullyDrawn() on the ActivityDonWindowFocusChanged() on the Activity

• Android Performance · 2 of 3

  Memory Leaks & LeakCanary

  What is the default value of LeakCanary.Config.maxStoredHeapDumps on a device?

  AThree heap dumpsBTwelve heap dumpsCSeven heap dumpsDTwenty heap dumps

• Android Performance · 3 of 3

  Perfetto & System Tracing

  One Android app (its own UID, not statsd) has 5 Perfetto tracing sessions running, and the device runs 8 in total. Which limit blocks the app from starting a sixth session?

  Atraced's per-UID limit of concurrent sessionsBtraced's per-UID limit of concurrent statsd sessionsCthe SDK limit of 8 data source instances per producerDtraced's device-wide limit of 15 concurrent sessions