Stream: git-wasmtime

Topic: wasmtime / PR #13716 Add memcpy-based i8 array constructo...

view this post on Zulip Wasmtime GitHub notifications bot (Jun 23 2026 at 14:12):

somdoron opened PR #13716 from somdoron:array-i8-slice to bytecodealliance:main:

Building a GC array of bytes from the host currently has to go through ArrayRef::new_fixed, which takes a slice of Val (32 bytes each) and writes one element at a time — a big transient allocation plus a per-element decode, with no faster path.

This adds new_from_i8_slice (+ async) and copy_to_i8_slice, which take a slice of u8 and fill/read the element body in a single memcpy, bypassing Val.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 23 2026 at 14:12):

somdoron requested pchickey for a review on PR #13716.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 23 2026 at 14:12):

somdoron requested wasmtime-core-reviewers for a review on PR #13716.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 23 2026 at 15:39):

github-actions[bot] added the label wasmtime:api on PR #13716.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 23 2026 at 15:39):

github-actions[bot] added the label wasmtime:ref-types on PR #13716.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 23 2026 at 15:40):

github-actions[bot] commented on PR #13716:

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cc @fitzgen

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view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:01):

fitzgen requested fitzgen for a review on PR #13716.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:01):

fitzgen unassigned pchickey from PR #13716 Add memcpy-based i8 array constructor and reader to ArrayRef.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:08):

:speech_balloon: fitzgen created PR review comment:

Ditto regarding MIRI

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:08):

:speech_balloon: fitzgen created PR review comment:

This test doesn't compile+run any Wasm, so I don't think we need to ignore it under MIRI, and in fact seems like a good thing to exercise under MIRI.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:08):

:memo: fitzgen submitted PR review:

Thanks! Just two little nitpicks below to address before this merges

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:38):

somdoron updated PR #13716.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:49):

:memo: somdoron submitted PR review.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:49):

:speech_balloon: somdoron created PR review comment:

fixed

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:49):

:memo: somdoron submitted PR review.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 19:49):

:speech_balloon: somdoron created PR review comment:

fixed

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 20:07):

:thumbs_up: fitzgen submitted PR review:

Thanks!

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 20:08):

fitzgen added PR #13716 Add memcpy-based i8 array constructor and reader to ArrayRef to the merge queue.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 20:32):

:check: fitzgen merged PR #13716.

view this post on Zulip Wasmtime GitHub notifications bot (Jun 30 2026 at 20:32):

fitzgen removed PR #13716 Add memcpy-based i8 array constructor and reader to ArrayRef from the merge queue.

Last updated: Jul 29 2026 at 05:03 UTC