Contact emailscleme...@google.com

ExplainerWe are ready for shipping the Multi-Memory proposal for
WebAssembly, which recently moved to phase 4 according to the WebAssembly
W3C process.

Specification
https://github.com/WebAssembly/multi-memory/blob/main/proposals/multi-memory/Overview.md

Design docs
https://github.com/WebAssembly/multi-memory/blob/main/proposals/multi-memory/Overview.md

Summary

Add support for more than one memory per WebAssembly module as specified in
the WebAssembly Multi-Memory proposal:
https://github.com/WebAssembly/multi-memory/blob/main/proposals/multi-memory/Overview.md

Blink componentBlink>JavaScript>WebAssembly
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EJavaScript%3EWebAssembly>

Search tagsWasm <https://chromestatus.com/features#tags:Wasm>, WebAssembly
<https://chromestatus.com/features#tags:WebAssembly>, Multi-Memory
<https://chromestatus.com/features#tags:Multi-Memory>

TAG reviewNot required as per: https://v8.dev/docs/feature-launch-process.
TAG review statusNot applicable

Risks

Interoperability and Compatibility

None


*Gecko*: Positive

*WebKit*: Positive

*Web developers*: Strongly positive (
https://github.com/WebAssembly/proposals)

*Other signals*: This was voted to phase 4 (standardization) at the October
2023 WebAssembly Community Group meeting. 38 of 43 votes were "strongly
for".

WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that
it has potentially high risk for Android WebView-based applications?

None


Debuggability

All memories are inspectable from DevTools, just like the first memory.

Will this feature be supported on all six Blink platforms (Windows, Mac,
Linux, Chrome OS, Android, and Android WebView)?Yes

Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
?

The WebAssembly proposal comes with all relevant tests; we pass them.

Flag name on chrome://flagsenable-experimental-webassembly-features

Finch feature nameNone

Non-finch justificationNone

Requires code in //chrome?False

Tracking bughttps://crbug.com/v8/13918

Estimated milestones
Shipping on desktop 120
DevTrial on desktop 117
Shipping on Android 120
DevTrial on Android 117
Shipping on WebView 120
Shipping on WebView 120
DevTrial on iOS 117

Anticipated spec changes

None.

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5106389887746048


This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.

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