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RasterCache::Get() methods were not updating the RasterCache::Entry access_count and used_this_frame fields, as is done in RasterCache::Prepare(). This can result in onscreen images being evicted from the cache as new entries are created (e.g. as new elements scroll onscreen).
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.