wasmtime/meetings/wasmtime/2021/wasmtime-11-11.md

November 11 Wasmtime project call

See the instructions for details on how to attend

Agenda

1. Opening, welcome and roll call
   1. Note: meeting notes linked in the invite.
   2. Please help add your name to the meeting notes.
   3. Please help take notes.
   4. Thanks!
2. Announcements
   1. Sumbit a PR to add your announcement here
3. Other agenda items
   1. Sumbit a PR to add your item here

Notes

Attendees

• WGR
• cfallin
• acrichton
• tschneidereit
• bjorn3
• abrown
• fitzgen
• Will W
• jlbirch

Notes

• Till: milestone to report: Fastly recently hit 1 trillion Wasm instantiations; no operational issues at scale (using Lucet with Cranelift)

  • Close to switching over to Wasmtime

  • Results from security assessment on integration of Wasmtime with Fastly's environment; no issues found

  • jlbirch: how will the switchover work?

  • Till: Not a prolonged period with two separate runtimes

  • Till: will update the group here once it's in production! In testing, we're seeing significant performance gains, excited and optimistic.

• Till: looking at optimizing the Python embedding, more info soon

• abrown: back after two months (welcome!), what are we excited about and looking forward to in the near future?

  • Till: Alex put together release infra (automated), RFC for 1.0 release.

    • before we do this, maybe a once-over on the documentation would be good
    • also planning around announcement/publicity

  • Till: Fastly has an intern working on wasm-mutate

    • fitzgen: this is for fuzzing; taking a valid Wasm module and tweaking it in some way to generate another case, for custom mutator hook

  • cfallin: ISLE DSL in Cranelift

  • WASI: adopted new format for the IDL, renamed it from witx. Better, more approachable developer experience. Dan working on applying all of this to wasi-libc, wasi-sdk, to make sure we have everything needed.

  • Till: fuzzing?

    • Alex: SIMD disabled until fuzzbugs fixed
    • spec interpreter fuzzing disabled for now due to timeouts
    • V8 differential fuzzing
    • cfallin: alternate way of using spec interpeter for individual instruction semantics possible
    • Till: would be good to take stock of SIMD status eventually and see if we might want to enable it

  • Andrew: relaxed SIMD, flexible vectors?

    • Alex: relaxed SIMD parsing from Yury at Mozilla
    • cfallin: flexible vectors in progress by Sam Parker at ARM