Not claiming it has the same performance as real shared memory, But at least rough semantics can be had: https://developer.mozilla.org/en-US/docs/Web/JavaScript

Not claiming it has the same performance as real shared memory, But at least rough semantics can be had: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... Can be read and written from multiple workers / main thread. Synconized with WASM atomics. Propgation speed of writes is undefined, likely to leave side channel attack mitigation options without spec-breaking.