commit 942ee55c4779f00285a3eaf10f0e774de00257c8
author Michal Mocny <mmocny@chromium.org> Fri May 16 23:51:01 2025
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Fri May 16 23:51:01 2025
tree 2aa38cebcae6a5b1bb377b7f36454b3faa8b6329
parent dc6e8140c6e1f0f42b2dcc1436d04adb5549480b

[soft navs] Constrain dom observations down to isConnected nodes.

We mark Nodes which are modified by tasks which have a
SoftNavigationContext -- but this takes a bit of bookkeeping to do.

Previously, we would do this even for Nodes which are not connected to
the dom, yet.  This meant that any large dom tree construction, followed
by a single attachment to the dom, would incur the costs at each Node.

Now, early-exit if the node is known to not be connected yet.  If it
never gets attached we never need to worry about it.  If it eventually
becomes connected by some ancestor, we'll only need to do the
accounting once, now.

Explainer: https://github.com/WICG/soft-navigations
Chromestatus: https://chromestatus.com/feature/5144837209194496
I2P: https://groups.google.com/a/chromium.org/g/blink-dev/c/MK01W5X_x6E/m/EoflhJsJAgAJ

Bug: 417492785
Change-Id: I371ca3f4d85a76165f6d2e2a31db4622729fc16b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6553304
Commit-Queue: Michal Mocny <mmocny@chromium.org>
Reviewed-by: Scott Haseley <shaseley@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1461686}