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Currently the rendering performance is less stable with this patch: https://flutter-flutter-perf.skia.org/e/?queries=device_type%3DPixel_7_Pro%26sub_result%3D90th_percentile_frame_rasterizer_time_millis%26sub_result%3D99th_percentile_frame_rasterizer_time_millis%26sub_result%3Daverage_frame_rasterizer_time_millis%26sub_result%3Dworst_frame_rasterizer_time_millis%26test%3Dcomplex_layout_scroll_perf_impeller__timeline_summary&selected=commit%3D40592%26name%3D%252Carch%253Dintel%252Cbranch%253Dmaster%252Cconfig%253Ddefault%252Cdevice_type%253DPixel_7_Pro%252Cdevice_version%253Dnone%252Chost_type%253Dlinux%252Csub_result%253D99th_percentile_frame_rasterizer_time_millis%252Ctest%253Dcomplex_layout_scroll_perf_impeller__timeline_summary%252C The reason I suspect that is that we're signaling the semaphore at the start of the raster thread. This means that we're limiting the actual number of pending presents to 1, as we also need to account for the CPU access. Increase this and the max texture count to 3, to allow 2 pending presents and one image worked on by the CPU.