tree d47a84be619204d482e1a4a6bd1e41c51ff1e8f0
parent 5617f98a2179022e99901763894d3fba16f329c7
author Hayato Ito <hayato@chromium.org> 1553239734 +0000
committer Commit Bot <commit-bot@chromium.org> 1553239734 +0000

[FastFlatTreeTraversal] Enter fast path always in Node::AssignedSlot()

If NeedsAssignmentRecalc() is true, the current code doesn't enter
fast path.

However, if Node::AssignedSlot() is repeated again and again without
any dom mutation, this can be improved by doing recalc assignements
once, and use the flat tree node data for the 2nd call or later.

This situation can happen in event dispatching, where we might need
to call Node::AssignedSlot for the same node repeatedly.

BUG: 906494
Change-Id: Iafd57a4ff90144da462d71066122ac6977fd8c84
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1531926
Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Hayato Ito <hayato@chromium.org>
Commit-Queue: Hayato Ito <hayato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643289}