We can pass the node hash directly to RemoteLayerTreePropertyApplier. The collection step doesn't seem to add anything except an extra hash lookup.
Created attachment 355720 [details] patch
Comment on attachment 355720 [details] patch Clearing flags on attachment: 355720 Committed r238549: <https://trac.webkit.org/changeset/238549>
All reviewed patches have been landed. Closing bug.
<rdar://problem/46273405>