FrameTimingManager is disabled by default for release builds due to the GPU measurement overhead on some platforms and graphics APIs such as OpenGL ES.
FrameTimingManager is always active in development builds and the Unity Editor.
To enable frame timing statistics for release builds:
Tip: If you use ProfilerRecorder to collect data, then you don’t need to enable the Frame Timing Stats property.
If you use the OpenGL platform, you also need to enable the OpenGL: Profiler GPU Recorders property to measure GPU usage. To do this: