Adds a memmove type opcode to WebAssembly and enhances existing data sections to support importable base.This allows better optimization of large memcpy/memmove operations. Data section improvement will make shared libraries work better, especially with threads.



Editor's draft

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 75
  • Chrome for Android release 75
  • Android WebView release 75

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Intent to Prototype url

Intent to Prototype thread

Search tags

wasm, webassembly, threads,

Last updated on 2020-11-09