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Android Frames

De-frost Dashboard

Lets understand the bar graph in differents segments

Structure

  • X-Axis: The contains frames indexes. It is just a number which helps us to organize frames in timely fashion
  • Y-Axis: Total time taken by a frame for rendering in milliseconds.
  • Red Dashed Line: Threshold line for Frozen Frames (render time > 700ms).
  • Green Line: Threshold line for Slow Frames (render time > 16ms).

Bar Segments

Each bar is divided into segments, representing rendering pipeline stages:

Vsync / Misc: Accounts for non-rendering work on the UI thread; consider offloading tasks to background threads to avoid delays.
Input Handling: Measures the time spent handling input event callbacks; optimize complex event handling or offload to separate threads.
Animation: Tracks the time needed to evaluate animators like ObjectAnimator or ViewPropertyAnimator; high values indicate expensive animation logic.
Measure / Layout: Calculates view sizes and positions; large times suggest deep or inefficient view hierarchies.
Draw: Captures commands for rendering UI elements; spikes occur with invalidated views or complex custom onDraw() logic.
Synchronization: Transfers bitmaps from CPU to GPU; optimize large or numerous resources to reduce overhead.
GPU Rendering: Executes rendering tasks using the GPU.

Identifying Frozen Frames

  • Frames with a total rendering time exceeding 700ms are classified as frozen frames.
  • The red line represents the frozen frame threshold.
  • Focus on reducing the height of the highest segments to optimize performance.