wg-performance Status Update 2021-11-08

[erwinmombay]

cc @ampproject/wg-performance

What was accomplished

Lessons Learned

What's Next

[rcebulko]

What was accomplished

• Implementations for component version mapping and component detection
• Fill in tests for transfomer, scanner code

What's Next

• Test BC on live documents
• Story research

[samouri]

What was accomplished

• enabled toplevel in terser configuration, reducing .js bundle sizes for bento: https://github.com/ampproject/amphtml/pull/36743
• fixed buggy unit tests for amp-script: https://github.com/ampproject/amphtml/pull/36663
• [under review] implemented server-rendering for amp-carousel: https://github.com/ampproject/amphtml/pull/36602
• Measured the cost of Context and forwardRef within Bento bundles. ~3kb each
• [in progress] creating manual hydration test for server-render compatible components: https://github.com/ampproject/amphtml/pull/36752

What's Next

• Present "Prioritizing Bento" at design review https://docs.google.com/document/d/1A817GqGoxmte3tGRSvfaFkcUZ36hFUYF0M2WRBPAfdA
• Ramp up on AMP Stories Runtime

[alexnj]

What was accomplished

• Ramp up on AMP Core, Viewer, prefetch and preload implementations.

What's Next

• Implement visibilityState: hidden into an experiment.
• Ramp up on AMP Stories.

[erwinmombay]

What was accomplished

• submitted server side render amp-story css code
• update validator to allow link[rel=stylesheet] to amp-story css

Lessons Learned

What's Next

• update amp-toolbox optimizer to add the link[rel=stylesheet] to amp-story css
• generate a new amp-story-no-css-1.0.js file with no css in it

[jridgewell]

What was accomplished

• Refactoring Enums to be statically DCE-able
• TC39
  • Array grouping to Stage 2
  • Private field destructuring to Stage 2
• Fixed bug with ESM not being served to direct AMP (google.com/amp/*)

Lessons Learned

What's Next

• Making ESM opt-out instead of opt-in
• AVIF/WebP byte size should now be available for selecting smallest images
• Jolt