Slow composites on the renderer thread, and the profiler wasn't able to obtain a lot of samples from the GPU process. Raising the priority of the GPU process might help (bug 1671490). But I wonder why the discrepancy in samples between the parent process and the GPU process is so large. Is the priority of the GPU process currently lower than the priority of the parent process?
Bug 1671498 Comment 3 Edit History
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Slow composites on the renderer thread, and the profiler wasn't able to obtain a lot of samples from the GPU process. Raising the priority of the GPU process might help (bug 1671490). But I wonder why the discrepancy in the sampling rate between the parent process and the GPU process is so large. Is the priority of the GPU process currently lower than the priority of the parent process?