FrameTiming class Null safety
Time-related performance metrics of a frame.
If you're using the whole Flutter framework, please use SchedulerBinding.addTimingsCallback to get this. It's preferred over using PlatformDispatcher.onReportTimings directly because SchedulerBinding.addTimingsCallback allows multiple callbacks. If SchedulerBinding is unavailable, then see PlatformDispatcher.onReportTimings for how to get this.
The metrics in debug mode (
flutter run without any flags) may be very
different from those in profile and release modes due to the debug overhead.
Therefore it's recommended to only monitor and analyze performance metrics
in profile and release modes.
- buildDuration → Duration
The duration to build the frame on the UI thread. [...]
- frameNumber → int
The frame key associated with this frame measurement.
- hashCode → int
The hash code for this object. [...]
- rasterDuration → Duration
The duration to rasterize the frame on the raster thread. [...]
- runtimeType → Type
A representation of the runtime type of the object.
- totalSpan → Duration
The timespan between vsync start and raster finish. [...]
- vsyncOverhead → Duration
The duration between receiving the vsync signal and starting building the
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
FramePhase phase) → int
- This is a raw timestamp in microseconds from some epoch. The epoch in all FrameTiming is the same, but it may not match DateTime's epoch.
) → String
A string representation of this object. [...]