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1. Mark perf overlay path as volatile 2. Set sample_margin_width = 0 to get a bar graph instead of saw-tooth. Previously, the perf overlay itself could be a significant performance hit and that makes it difficult to profile flutter app.
Flow
Flow is a simple compositor based on Skia that the Flutter engine uses to cache recoded paint commands and pixels generated from those recordings. Flow runs on the GPU thread and uploads information to the GPU.