# Summary JavaScript parsing and compilation are performance bottlenecks. The JavaScript Binary AST is a domain-specific content encoding for JavaScript, designed to speed up parsing and compilation of JavaScript, as well as to allow streaming compilation of JavaScript (and possibly streaming startup interpretation).
We already get a 30-50% parsing improvement by just switching to this format, without any streaming code optimization, and we believe that we can go much further. We wish to implement `application/javascript+binast` so as to start experiments with partners. # Bug Bug 1451344 # Link to standard This content encoding is a JS VM technology, with an entry point for loading in the DOM. - DOM level: No proposal yet. https://github.com/binast/ecmascript-binary-ast/issues/27 - JS level (high): https://binast.github.io/ecmascript-binary-ast/ - JS level (low): No proposal yet. https://binast.github.io/binjs-ref/binjs_io/multipart/index.html#overview # Platform coverage All. # Estimated or target release For the moment, no target release. We are still in the experimentation phase. # Preference behind which this will be implemented dom.script.enable.application_javascript_binast # Is this feature enabled by default in sandboxed iframes? This is just a compression format, should make no change wrt security. # DevTools bug Bug 1454990 # Do other browser engines implement this? Not yet. We are still in the experimentation phase. # web-platform-tests No web platform specification yet. # Secure contexts Let's restrict this to secure contexts. _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
