Meeting 2024-06-11

• Team calendar

  • Next on Necko triage: Valentin

• New contributors / Friends of Necko THANK YOU!!

  • nika@thelayzells.com fixed Bug: 1718673 text/event-stream mime type starts downloading instead of streaming content 

  • fwang@igalia.com fixed 

    • Bug: 1882084 Support fetchpriority in Early Hints preloader

    • Bug: 1892734 Add tests for checking the priority set in our HTTP requests 

    • Bug: 1901220 Perma TEST-UNEXPECTED-FAIL | /_mozilla/fetch/fetchpriority/fetchpriority-urgency.h2.html | Adjustment of urgency parameter for <...> when Gecko 128 merges to beta on 2024-06-10 

  • jschanck@mozilla.com fixed Bug: 1892528 Enable Xyber768 in Http/3 TLS handshakes under a pref 

  • bugmail@asutherland.org fixed Bug: 1900681 XMLHttpRequestMainThread::DisconnectFromOwner should not call Abort for `mForWorker` XHRs because it double-clocks the state machine 

• Round Table

  • Potential performance opportunity? https://www.bleepingcomputer.com/news/google/google-chrome-reduced-cookie-requests-to-improve-performance/ 

    • Relaying same cookie that has been broadcast multiple times, we could be duping sends - Ed to review and consider 

  • Standards positions:

    • Bug: 1475599 Implement Cookie-Store API 

      • Web compatibility with Chrome and Safari

        • Safari recent, web compatibility risk is higher

    • Request standards position review?

    • Randell ping Simon in channel 

    • Zstd - standards position update? Randell to ping Simon

• Active Projects roadmap Fx127 rel June 11, Fx128 rel July 09, Fx 129 soft freeze July 04 

  • Native HTTPS RR Implementation (in progress, target Fx129)

    • Performance regression identified in Nightly https://bugzilla.mozilla.org/show_bug.cgi?id=1895908#c15 

    • [kershaw]

      • Bug 1898191 Improving HTTPS RR Handling to Mitigate Performance Regression

        • https://glam.telemetry.mozilla.org/fenix/probe/networking_http_channel_page_open_to_first_sent/explore?aggType=avg&currentPage=1&ref=2024022904&timeHorizon=ALL&visiblePercentiles=%5B99%2C95%2C75%2C50%2C25%2C5%5D 

  • 3rd Party Cookie Deprecation (in progress, target Fx132)

    • [Ed] Added tests and put into review, two patches now in review:

      • https://phabricator.services.mozilla.com/D201757

      • https://phabricator.services.mozilla.com/D203521

  • Fetch keepalive: (in progress, Target Fx129) 

    • (greg) Jason Kratzer I see that this is behind a pref. Is this ready for fuzz testing? Not yet, landing MS1 next week. Could be tested after next week we have all WPT passing

      • [Sunil] Can test after 

    • Landing in progress for 1871377, 1871376 

    • Started working on 1871378.

• HTTP Priorities Experiments (in progress, target Fx130 )

  • (valentin) Working on experiment brief. Will sync up with Andrew to launch experiment.

• Firefox/Chrome benchmark test suite (in progress, Fx132)

  • – enter updates – 

• Interop 2024 URL (in progress, target H2 2024)

  • (sekim) Patch for Bug 1874118 - Fix handling of trailing characters in opaque paths in URL

  • (sekim) Currently debugging a Rust URL bug 

  • (sekim) Few other patches are waiting for review.

  • (sekim) This Patch works except for Windows, Testing URL on Windows?  

• necko-glean: (sekim) due to incidents, currently on hold.

  • – enter updates – 

• Fast UDP I/O in Firefox

  • https://bugzilla.mozilla.org/show_bug.cgi?id=1852924 

  • [mxinden] Fast UDP for Firefox Project Plan - Fast UDP for Firefox

    • Milestone 1

      • https://bugzilla.mozilla.org/show_bug.cgi?id=1901295

      • QUIC UDP I/O using quinn-udp

    • Milestone 2

      • Neqo sending and receiving ECN markings

    • Milestone 4

      • Neqo receiving multi-packet via GRO

    • Each still needs a lot of work, especially across platforms.

• Performance work: 

  • Glean on Android update

    • [acreskey] Please #ifndef Android new glean probes unless specifically needed, until glean performance is improved 

  • [acreskey] FYI: 

    • Fenix TLS connection times appear to have increased around March 19, 2024

    • https://bugzilla.mozilla.org/show_bug.cgi?id=1901604

  • New experiments:

    • Performance Calibration (A/A/A) on Fenix, live (release channel might be affected, some probes)

      • Finishing today

      • https://experimenter.services.mozilla.com/nimbus/fenix-performance-metric-calibration/edit/overview

    • OMT Decompression + html5Parser, cssLoader 

      • Experiment Brief

      • Data team on work-week. Will attend data office hours next week.