[Webkit-unassigned] [Bug 244695] New: AX: AXObjectCache::handleChildrenChanged should not dirty the whole tree's children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=244695

            Bug ID: 244695
           Summary: AX: AXObjectCache::handleChildrenChanged should not
                    dirty the whole tree's children
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tyler_w at apple.com
                CC: andresg_22 at apple.com,
                    webkit-bug-importer at group.apple.com

AXObjectCache::handleChildrenChanged does this:


bool shouldUpdateParent = true;
for (auto* parent = &object; parent; parent = parent->parentObjectIfExists()) {
    if (shouldUpdateParent)
        parent->setNeedsToUpdateChildren();

    ...
}

Which seems wasteful. We should probably not dirty the entire ancestry of every changed object when it's just the children of target object that have changed.

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