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Explainer None Specification https://tc39.github.io/ecma262/#sec-sharedarraybuffer-objects Design docs https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer Summary Adds the JavaScript type SharedArrayBuffer gated behind COOP/COEP. The concept of a SharedArrayBuffer is that a message to a worker, is posted but instead of copying the content of the array just a reference to it is shared. The Atomic API provides atomic loads and stores and Read/Modify/Write accesses to SharedArrayBuffers. The Atomic.wait provides the ability for a worker to wait for another worker to signal it, without having to spinlock. Blink component Blink>JavaScript Search tags SharedArrayBuffer, SAB TAG review https://github.com/w3ctag/design-reviews/issues/471 TAG review status Pending Origin Trial Name SharedArrayBuffers in non-isolated pages on Desktop platforms Chromium Trial Name UnrestrictedSharedArrayBuffer Link to origin trial feedback summary https://bugs.chromium.org/p/chromium/issues/entry?components=Internals%3ESandbox%3ESiteIsolation Origin Trial documentation link https://developer.chrome.com/blog/enabling-shared-array-buffer/ Risks Interoperability and Compatibility Gecko: Shipped/Shipping (https://bugzilla.mozilla.org/show_bug.cgi?id=1312446) WebKit: Shipped/Shipping (https://developer.apple.com/library/content/releasenotes/General/WhatsNewInSafari/Articles/Safari_10_1.html) Web developers: Positive Other signals: 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? Goals for experimentation Reason this experiment is being extended This is a deprecation trial, and we're giving more time to websites to stop using the deprecated behavior. Reason this experiment is being extended The release of DocumentIsolationPolicy in M137 is helping developers adopt crossOriginIsolation as a way out of this reverse Origin Trial. However, it will still take time for developers to adopt. We would like to extend the OT as the final extension and give developers 6 milestones to get out of this reverse Origin Trial. Once this is approved and developers have requested their token, we will close this trial so that no further origins adopt the deprecated behavior. Ongoing technical constraints Debuggability DevTools warning in case SAB is used in none COI context is in place Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)? No Is this feature fully tested by web-platform-tests? Yes https://source.chromium.org/chromium/chromium/src/+/master:third_party/blink/web_tests/external/wpt/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/no-coop-coep.https.any.js https://github.com/tc39/test262/tree/master/test/built-ins/SharedArrayBuffer https://github.com/tc39/test262/tree/master/test/built-ins/Atomics Flag name on about://flags Finch feature name None Non-finch justification None Requires code in //chrome? False Tracking bug https://bugs.chromium.org/p/chromium/issues/detail?id=709179 Launch bug https://bugs.chromium.org/p/chromium/issues/detail?id=1138860 Estimated milestones Origin trial desktop first 92 Origin trial desktop last 131 Origin trial extension 1 end milestone 109 Origin trial extension 2 end milestone 131 Origin trial extension 3 end milestone 124 Origin trial extension 4 end milestone 136 Origin trial extension 5 end milestone 142 DevTrial on desktop 60 DevTrial on Android 88 Link to entry on the Chrome Platform Status https://chromestatus.com/feature/4570991992766464?gate=6222972867837952 Links to previous Intent discussions Intent to Experiment: https://groups.google.com/a/chromium.org/g/blink-dev/c/1NKvbIj3dq4 Intent to Extend Experiment 1: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAH0ixBN2JhcYtpT4UYKcAfHt1e0Wz_Uxz0CkXcAntguhbmyNCA%40mail.gmail.com Intent to Extend Experiment 2: https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/4tDmckQLZLQ Intent to Extend Experiment 3: https://groups.google.com/a/chromium.org/g/blink-dev/c/UospzV3lZMk/m/X9K0k8kuAQAJ Intent to Extend Experiment 4: https://groups.google.com/a/chromium.org/g/blink-dev/c/A4CR6MIVzds/m/rpsWnzq6AAAJ?e=48417069 Intent to Ship: https://groups.google.com/a/chromium.org/g/blink-dev/c/1NKvbIj3dq4 This intent message was generated by Chrome Platform Status. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/681b67ca.170a0220.4750a.028e.GAE%40google.com.
