1962563 - Improve barriers on wasm array allocations

Status: ASSIGNED

(Core :: JavaScript: WebAssembly, enhancement)

Description

[Ben Visness [:bvisness]]

There are possibly some ways we could improve our post barriers on wasm gc array allocations to get better performance out of array-heavy workloads. For example, we have this longstanding comment suggesting a way to skip post-barriers, and now that we can do whole-cell store buffer entries, we could possibly use those in many cases to make better use of the store buffer overall.

Comment 1

[Ben Visness [:bvisness]]

Attachment: WIP: Bug 1962563: wasm: Improve post barriers on array allocs.

We can use whole-cell post barriers for some cases to improve pressure
on the store buffer in general.