Wasmtime meeting notes from 2021-11-11.

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Chris Fallin
2021-11-11 09:33:41 -08:00
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### Attendees
- WGR
- cfallin
- acrichton
- tschneidereit
- bjorn3
- abrown
- fitzgen
- Will W
- jlbirch
### Notes
* Till: milestone to report: Fastly recently hit 1 trillian 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