Flush the DrawingContext of the RemoteImageBufferProxy once the PutImageData item is recorded. So no expensive operation is going to block the painting.
Created attachment 412157 [details] Patch
This patch gives 20% progression for the Images test on iPhone 11 Pro Max when GPU rendering is on.
Tools/Scripts/svn-apply failed to apply attachment 412157 [details] to trunk. Please resolve the conflicts and upload a new patch.
Created attachment 412564 [details] Patch
Committed r269123: <https://trac.webkit.org/changeset/269123> All reviewed patches have been landed. Closing bug and clearing flags on attachment 412564 [details].
<rdar://problem/70779518>