Stream: git-wasmtime

Topic: wasmtime / PR #14460 Component async coop yield

view this post on Zulip Wasmtime GitHub notifications bot (Sep 30 2026 at 20:48):

macovedj opened PR #14460 from macovedj:component-async-coop-yield to bytecodealliance:main:

Wasmtime can keep processing ready, high-priority component work without yielding to the async executor. The two tests cover ways this can happen. In the first, a batch of spawned store tasks finishes before a sibling Tokio task gets a turn to send its oneshot result. In the second, cancellation callbacks repeatedly start and cancel new subtasks, keeping the event loop busy while a timer cannot complete.
This change caps the number of event-loop work turns between yields at 128. I chose 128, inspired by Tokio’s cooperative budget, but I’m happy to consider another cap or a different approach.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 30 2026 at 20:48):

macovedj requested cfallin for a review on PR #14460.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 30 2026 at 20:48):

macovedj requested wasmtime-core-reviewers for a review on PR #14460.

view this post on Zulip Wasmtime GitHub notifications bot (Sep 30 2026 at 22:47):

github-actions[bot] added the label wasmtime:api on PR #14460.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 01 2026 at 16:15):

:thumbs_up: cfallin submitted PR review:

The fix looks reasonable to me; maybe double-check with @dicej that this makes sense before merging?

view this post on Zulip Wasmtime GitHub notifications bot (Oct 01 2026 at 16:15):

:speech_balloon: cfallin created PR review comment:

tiny nit but caught my eye -- s/idividual/individual/ on the comment two lines above (pre-existing).

(may be the first time we actually use our "typo fixes go along with other changes" policy!)

view this post on Zulip Wasmtime GitHub notifications bot (Oct 01 2026 at 16:52):

:thumbs_up: dicej submitted PR review:

Thanks, @macovedj!

view this post on Zulip Wasmtime GitHub notifications bot (Oct 01 2026 at 18:10):

macovedj updated PR #14460.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 01 2026 at 20:46):

cfallin added PR #14460 Component async coop yield to the merge queue.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 01 2026 at 21:10):

:check: cfallin merged PR #14460.

view this post on Zulip Wasmtime GitHub notifications bot (Oct 01 2026 at 21:10):

cfallin removed PR #14460 Component async coop yield from the merge queue.

Last updated: Oct 11 2026 at 02:20 UTC