• Chrome Dev Summit 2017

2017-Oct-26 | developer.chrome.com/devsummit

By Sam Saccone

• window.navigator.connection API
• cache digest for http2 push
  • "overpush"ed assets
  • cache digest tells what's in the local cache
  • https://goo.gl/wMiWfJ
• asset priority hints
  • explict priorities vs inferred priorities
  • browser inference engine
  • link rel and img tag hacks for hacking higher priorities
  • gituhb.com/WICG/priority-hints
  • group attribute ["critical", "late" etc.]
  • const controller = new FetchController(); controller.signal; controller.setPriority()
• async images
  • large image, followed by script
  • image download, image decode blocks main thread. so the script gets blocked
  • new async attribute on the img tag
• Runtime perf
  • move work out of the critical path. without impacting UX
  • web workers keeps the main thread free
    • no access to DOM. DOMChangeList proposal. enables contruction of DOM opterations
    • whatwg/dom#270
    • SharedArrayBuffer()
    • https://goo.gl/B725QT
    • preact-worker-demo.surge.sh
    • https://github.com/GoogleChromeLabs/comlink
    • https://github..com/robwormald/ng-webworker-demo

By Thomas Nattestad

• https://twitter.com/V8js
• https://vsproject.blogspot.com