
The change to fix PowerVR barriers regressed Mali (see https://github.com/flutter/flutter/issues/165538) We need to tighten the barriers to remove the transfer barrier to get back mali performance. however, this requires us to drop the usage of the blit for onscreen restore. not a huge loss imo. At any rate, all of these changes should be visible in benchmarks.
Flutter Engine
Setting up the Engine development environment
See here
gclient
bootstrap
Flutter engine uses gclient
to manage dependencies.
If you've already cloned the flutter repository: