Deep dive into Android Studio Profilers
summary
Deep dive uses Android Studio Profilers on the Santa Tracker app to show concrete workflows: CPU recordings (sampled Java, trace Java, sample native, trace system calls) with flame/top-down/bottom-up views and a filter to highlight methods, exporting/importing .trace files, and frame jank detection at the 16 ms threshold (emulator shows more red frames than a device). Memory demo toggles Full allocation tracking vs Sampled/None, uses heap dumps and GC to find a retained Penguin Swim fragment caused by a nonstatic inner long‑running task and fixes it with proper cancellation, and shows manual instrumentation via trace beginSection/endSection.
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chapters (22)
- 0:00Introduction
- 1:41Overview
- 2:19Demo
- 3:03CPU Profiler
- 3:47CPU Recordings
- 4:16Recording Details
- 4:41Zoom to Selection
- 5:25Call Stacks
- 6:22Customization
- 7:38Virtual Machine
- 7:57Zoom in
- 8:45Snowflake
- 11:02Flame
- 12:23Native Functions
- 13:21Tracing Functions
- 15:12CD Quiz
- 17:44System Cost
- 20:47Smooth UI
- 23:02Tracing Points
- 25:32Instrumentation
- 28:19Memory
- 32:12Depth
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