TC39 General
2025-07-23
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09:36
<nicolo-ribaudo>
For the immutable ArrayBuffer proposal, are we expecting that in browsers they can be shared across threads without needing to copy the memory?
14:30
<Richard Gibson>

yes; see https://github.com/whatwg/html/pull/11033 : https://whatpr.org/html/11033/structured-data.html#structuredserializeinternal:isimmutablebuffer

To support deserialization by independent processes at arbitrary points in the future, the contents of value.[[ArrayBufferData]] need to be preserved when forStorage is true. But otherwise, a pointer referencing value.[[ArrayBufferData]] is expected to suffice.

14:31
<nicolo-ribaudo>
Awesome, thanks!