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Katie Hempenius

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What’s new in performance?performance.now() 20222022-10-27
Chrome now ships BFCache which makes back/forward navigations instantaneous and Chrome measures ~1 in 10 desktop and 1 in 5 mobile navigations as forward/back…
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Fixing common Web Vitals issuesChrome Dev Summit 20202020-12-09
CLS is computed by a PerformanceObserver that sums layout-shift entries and only finalizes on a document visibilitychange to hidden, with shifts within 500 ms…
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Speed at Scale: Web Performance Tips and Tricks from the TrenchesGoogle I/O 20192019-05-07
Lightweight, actionable fixes and measurable wins: add LightWallet budgets to Lighthouse to catch PR regressions; Jabong cuts app size 80% and its PWA reaches…
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Speed Essentials: Key Techniques for Fast WebsitesChrome Dev Summit 20182018-11-12
Images often dominate bytes so convert animated GIFs to video (5–20× smaller) and serve WebP 25–35% smaller via picture/source; automate Imagemin and use Sharp…
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Improving Page Performance in Modern Web AppsSmashing Conference London 20182018-02-07
The network, browser, and hardware can all constrain page performance in modern web applications. This talk looks at why these constraints exist, how they can…
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