311672 2026-04-07 13:46:17 -0700 Skip full-page anchor scan for conservative-only speculation rules 2026-04-08 19:34:24 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 basuke basuke webkit-bug-importer oldest_to_newest 2197742 0 basuke 2026-04-07 13:46:17 -0700 processSpeculationRules() scans ALL links on every style recalculation, performing pattern/selector evaluations per anchor. For conservative rules (eagerness: conservative), the result is only consumed at user interaction time (mousedown/pointerdown/keydown). This is wasted work on pages with many links (e.g. magnifiedsand.com with 934 links). This patch defers matching for conservative-only rules to interaction time in HTMLAnchorElement::defaultEventHandler(), skipping the full-page anchor scan in Document::processSpeculationRules() and HTMLAnchorElement::checkForSpeculationRules() when all rules are conservative. 2197748 1 basuke 2026-04-07 13:55:25 -0700 <rdar://problem/173520903> 2197749 2 basuke 2026-04-07 13:55:40 -0700 Pull request: https://github.com/WebKit/WebKit/pull/62216 2198226 3 ews-feeder 2026-04-08 19:34:23 -0700 Committed 310814@main (5cf7b15948ed): <https://commits.webkit.org/310814@main> Reviewed commits have been landed. Closing PR #62216 and removing active labels.