JavaScript:Projects

This list of active JS projects was compiled from older lists of tracked projects and 2013 projects.

JavaScript Language

Parallel JS

• Goal: Expose finer-grain parallelism to JavaScript.
• Team: sstangl, luke, niko, shu?
• Tracking bug: bug 891877
• More info: Work includes a parallel subset of JS (bug 891877), RiverTrail/ParallelArray (bug 801869), and prototyping Shared ArrayBuffers.

ECMA-402 i18n

• Goal: Implement ECMA-402, the ECMAScript Internationalization API.
• Developer: jwalden
• Tracking bug: bug 837963
• More info: https://wiki.mozilla.org/User:Waldo/Internationalization_API

Test262

• Goal: Integrate test262, ECMA's ECMAScript conformance test suite, into Mozilla's tests (bug 496923) and fix failures (bug 652780).
• Developer: jwalden
• Tracking bug: bug 496923
• More info: https://wiki.mozilla.org/User:Waldo/ES6_testing and http://test262.ecmascript.org/

ES6

• Goal: Implement ES6 language support.
• Team:
• Tracking bug: bug 694100
• More info: https://wiki.mozilla.org/ES6_plans

Classes

• Goal: Implement classes.
• Team:
• Tracking bug: bug 837314
• More info: http://wiki.ecmascript.org/doku.php?id=harmony:classes

Modules

• Goal: Implement modules.
• Team: Eddy and Jason?
• Tracking bug: bug 568953
• More info: http://wiki.ecmascript.org/doku.php?id=harmony:modules

Symbols

• Goal: Implement symbols (formerly private name objects).
• Team: Eddy
• Tracking bug: bug 645416
• More info: http://wiki.ecmascript.org/doku.php?id=harmony:private_name_objects

Typed Objects

• Goal: Implement typed objects (formerly binary objects) for efficient, structured access to contiguously allocated data.
• Team: Nikhil, Niko?
• Tracking bug: bug 578700
• More info: http://wiki.ecmascript.org/doku.php?id=harmony:typed_objects

GC

Generational GC

• Goal: Implement generational garbage collector (GGC) and exactly root Firefox.
• Team: terrence, sfink, jonco
• Tracking bug: GGC bug 619558 and Exact Stack Rooting bug 753203
• More info: https://wiki.mozilla.org/Javascript:SpiderMonkey:ProjectGenerationGarbageCollection and rooting hazard burndown chart

Future

• Compacting GC
• Incremental Browser Marking
• Nursery allocation of JSStrings
• G1: The Good Parts bug 902174
• Concurrent GC

Performance

ARM/B2G

• Goal: Optimize ARM performance for Firefox OS and Android.
• Team: dcrosher, jcoppeard, mrosenberg
• Tracking bug: bug
• More info:

AWFY

• Goal: Optimize AWFY benchmarks.
• Team:
• Tracking bug: bug
• More info: http://arewefastyet.com/

OdinMonkey

• Goal: Optimize OdinMonkey and Emscripten.
• Team: luke, alon
• More info: https://wiki.mozilla.org/Javascript:SpiderMonkey:OdinMonkey
  • Visual Studio integration with Emscripten - Naveed waiting on contractor SOW

Browsermark 2.0

• Goal: Run Browsermark 2.0 benchmark in-house.
• Team: Naveed
• Tracking bug: bug 915281
• More info: http://browsermark.rightware.com/

Selenium Browser Benchmark

• Goal: Create a test framework to browse real websites using Selenium scripts and measure performance regressions.
• Team: jmaher, bclary, luke
• Tracking bug: bug
• More info: The A-Team is implementing this test framework with input from Luke. https://etherpad.mozilla.org/js-benchmarking

Start-up Cache

• Goal: Bytecode cache API?
• Team: npierron
• Tracking bug: bug 900255
• More info: The target would be to land with support of packaged app for B2G 1.4 / 1.5 (Gecko 30 / 32).

Dev Tools

jsdbg2

• Goal: Add profiling API (bug 797876) and JIT stack debugging (bug 716647) jsdbg2, then remove JSD1 (bug 800200).
• Team: jimb?
• Tracking bug: bug 800200
• More info:

Heap Profiling

• Goal: Add integrated tools for tracking memory use, finding leaks, and so on.
• Team: jimb?
• Tracking bug: bug
• More info: https://wiki.mozilla.org/Javascript:SpiderMonkey:HeapProfiling

Stack Snapshots

• Goal: Add lightweight records of where errors occurred, where event handlers were registered, and so on.
• Team: jimb?
• Tracking bug: bug
• More info: https://wiki.mozilla.org/Javascript:SpiderMonkey:StackSnapshots

Technical Debt

Run TBPL Tests On All Platforms

• Goal: Get our existing test suites running on TBPL in all combinations of the shell and browser on both desktop and ARM.
• Team:
• Tracking bug: bug
• More info:

Minimize Header Dependencies

• Goal: Reduce header dependencies of jsapi.h and friends to improve rebuild times.
• Team: njn
• Tracking bug: bug 908050
• More info: bug 785103 tracks header minimization for all of Gecko.

Refactor MOP

• Goal: Update meta-object protocol to be more ES5/ES6-like.
• Team: jwalden
• Tracking bug: MOP bug 637378 and property/element bug 586842
• More info: https://wiki.mozilla.org/Javascript:SpiderMonkey:PropertyElementStorage

Remove JSContext

• Goal: The single-threaded JSRuntime makes JSContext unnecessary, but most of the work is to make Gecko stop depending on them (bug 767938).
• Team:
• Tracking bug: JSContext bug 650361 and Gecko bug 767938
• More info:

Research

Shumway

• Goal: Add built-in SWF support to Firefox with Shumway.
• Team: mbebenita, shu, till, tobeytailor, ydelendik
• Tracking bug: bug 904346
• More info: http://www.areweflashyet.com/