wg-performance Status Update 2021-10-11

[erwinmombay]

cc @ampproject/wg-performance

What was accomplished

Lessons Learned

What's Next

[samouri]

What was accomplished

• Found a source of test flakiness issues (Bento Unit Test Isolation amphtml#36239), fix in progress: bento unit tests: flush all hooks/renders after each test run amphtml#36261
• bento-compiler now exports type + compiler.js now uses tsc: Explicitly export types from index.ts bento-compiler#27, compiler: use typescript types amphtml#36220
• in-progress typechecking for carousel + prototyping carousel buildDom (use tsc typechecking for carousel 0.1 amphtml#36296)
• Release onduty (performance-impl: cant check ampdoc vis hidden while null amphtml#36197, test cases: amp-video hint missing amphtml#36252, test cases: amp-carousel slide count not updating amphtml#36253)
• small cleanups / fixes:
  • BaseElement: remove .getWin() amphtml#36294
  • bento amp-iframe: guard effect from running without a win amphtml#36241
  • Rename viewportCallbackTemp --> viewportCallback amphtml#36245
  • performance-impl: cant check ampdoc vis hidden while null amphtml#36197

Lessons Learned

• A constructor can return a whole new object..this is not documented anywhere (on MDN) but is part of the spec.

What's Next

• compiler c++ parse versions map
• carousel buildDom

[rcebulko]

What was accomplished

• Release on-duty engineer
• compiler deployment and horizontal scaling
• service-level compiler pooling and vertical scaling
• load-testing and benchmarking
• some core migration

Lessons Learned

• coding for very high-concurrency threading is difficult and fascinating

What's Next

• compiler docs
• flag-guarded compiler deployment
• convert #core to typescript

[jridgewell]

What was accomplished

• 🐛 Correctly detect P tags as text element types amphtml#36268
• ✨ Include a random eventid to associate CLS over a page session amphtml#36289
• 🐛 Use timeOrigin for getFirstVisibleTime when page starts visible amphtml#36273
• Code reviews
• Found bug with amp-video requesting a null poster
• Found bug with amp-story-player requesting an invalid Cache URL

Lessons Learned

What's Next

• Jolt Abastract Ops
• Image Metadata
• Final AVIF/WebP work

[erwinmombay]

What was accomplished

• submitted for review Gzip Utilities for prepending an uncompressed piece of string to a gzip compressed content.

Lessons Learned

What's Next

• work on the amp-stories transformer css inlining work