ecmascript_sharedmem

This is a specification for Shared Memory and Atomics for ECMAScript, a proposal submitted to Ecma TC39 and currently at Stage 2 in the ECMAScript approval process.

Documentation and other materials

• Formatted specification
• Simple tutorial introduction
• Demo programs and other examples
• Frequently asked questions
• High-level design issues, cross-cutting concerns, security concerns, etc
• Slide decks for presentations given to Ecma TC39:
  • September 2015
  • January 2016
• asm.js companion specification

Firefox and Chrome implementations

Both Firefox and Chrome ship with prototype implementations of the proposal; these are largely compatible.

• The feature is enabled by default in Firefox Nightly; starting with Firefox 46, users of Developer Edition, Aurora, Beta, and Release can visit about:config and set the option javascript.options.shared_memory to true.
• The feature is off by default in Chrome, but can be enabled by passing the command line options --js-flags=--harmony-sharedarraybuffer and --enable-blink-feature=SharedArrayBuffer. (Known to work in Chrome 48.)

Miscellaneous

The sources for the specs are in the tc39/ subdirectory and the formatted versions are generated with the format.sh script.