slowrendering

Slow Rendering Instrumentation

Status: experimental

The OpenTelemetry slow rendering instrumentation for Android will detect when the application user interface is slow or frozen. See the Android documentation for a discussion of UI "jank".

The instrumentation operates by periodically polling for frame metrics, by default every 1 second.

Telemetry

This instrumentation produces the following telemetry, with an instrumentation scope of io.opentelemetry.slow-rendering.

Slow Renders

Generated when rendering takes more than 16ms.

• Type: Span (zero duration)
• Name: slowRenders
• Description: This event is emitted when frame metrics contain at least one render duration longer than 16ms.
• Attributes:
  • count - the number of slow renders
  • activity.name - the name of the activity for which the slow render was detected

Frozen Renders

Generated when rendering takes more than 700ms.

• Type: Span (zero duration)
• Name: frozenRenders
• Description: This event is emitted when frame metrics contain at least one render duration longer than 700ms.
• Attributes:
  • count - the number of slow renders
  • activity.name - the name of the activity for which the slow render was detected