Why Prerendered LCP Reads 6.2s Without activationStart
Speculation Rules prerendering folds the whole pre-click wait into raw LCP. I measured a 6244ms vs 103.5ms gap on Chrome 150 and mapped where RUM needs fixing.
Tags
core-web-vitals
3 posts
WebSockets and bfcache: Chrome 150 Still Said 'websocket'
Chrome 149 said active WebSockets no longer block bfcache. I re-measured on three Chrome 150 builds and notRestoredReasons still returned 'websocket'. Why?
One listener costs you the back button: six bfcache probes
Six pages, one bfcache blocker each, measured on real back navigations with pageshow.persisted and notRestoredReasons. Only unload blocked the restore.