author James Teh <>
Wed, 01 Feb 2023 05:02:01 +0000
changeset 651150 dd0fdd1daa69783be36acd5c50544f3694eaa8f9
parent 548826 7f3f056d1898dc7749f7b324d0c67a56271b47fd
permissions -rw-r--r--
Bug 1813980: Check IsDoc before Parent in RemoteAccessibleBase::ApplyCrossDocOffset. r=morgan We call this function on every ancestor when calculating bounds. RemoteParent() currently requires a hash lookup, so it's more efficient to early return for !IsDoc() first. This is a micro-optimisation, but it might have some impact given that we call this on every ancestor, especially when hit testing, where we call Bounds() a lot. As a bit of drive-by cleanup, use RemoteParent() rather than calling Parent() and IsRemote/AsRemote(). Differential Revision:

<!DOCTYPE html>
<script src="apz_test_native_event_utils.js"></script>
<script src="apz_test_utils.js"></script>
body, html {
    margin: 0;
<div id="scrolltarget" style="margin-top: 5000px; height: 5000px">#scrolltarget</div>