Platform/2011-Q4-Goals

General Goals

• https://intranet.mozilla.org/2011Q4Goals

GFX

• [DONE] Fennec layers acceleration
  • Use OpenGL ES on at least a subset of Android hardware
• [AT RISK] CSS 3 Font Spec Implementation
  • Complete bug 651693
• [DROPPED] Electrolysis Accelerated Layers
  • Evaluate current status
  • Finish Direct3D 10/Direct2D, Direct3D 9, Mac OS X OpenGL layers implementation
  • For non-sandboxed processes only
• [ON TRACK] Thebes wrapper for Azure
  • Land on mozilla-central
• [ON TRACK] Skia backend for Azure
  • Landed and able to be turned on for canvas
  • Demoable for general content (not just canvas) - not necessarily demoable from mozilla-central
• [DROPPED] Texture sharing for WebGL
  • On OSes where it's supported, enable cross-process WebGL by sharing textures between content and chrome processes
• Other important Q4 work
  • Finish cross-process Linux OpenGL layers implementation (on desktop)
  • Azure - Cairo backend
    • Possibly only on graphics branch
  • Continue using telemetry
  • Imagelib work on memory usage and efficiency
  • Windows 7 font rendering survey via Test Pilot
  • [done] Multiple GPU support on Mac OS X
  • WebGL improvements
    • [done] Anti-aliasing
    • ARB_robustness / EGL_LOST_CONTEXT
    • Auditing remaining failing conformance tests

Layout

• [ON TRACK] Complete Mobile Readability project (Phase 1 & make decision on Phase 2)
  • part 1 landed but still needs tuning based on feedback and also UI
• [ON TRACK] Diagnostic tools for text and font memory usage in about:memory
  • Code is implemented and needs code review
• [ON TRACK] Graphite Font Layout system
  • Code is implemented and will land pref'd off
• [ON TRACK] Multi-column Compliance (de-prefixing)
  • Implementation of column-fill property needs to be finished and landed.
  • De-prefixing of all current column implementation, except column-span, needs to be finished and landed.
  • Implementation of column-span property has been moved to Q1 2012.
• [AT RISK] Complete SVG migration to DisplayList (Performance)
  • We de-prioritized SVG work in Q4 to fix other bugs
• [AT RISK] Implement CSS spec for flex-box
  • CSS flexbox spec is still in working draft. New ETA for this feature: Q1 2012
• [ON TRACK] Selection bit - Move from Layout to Content - Mutation events update DOM (619273)
• [ON TRACK] Complete View class removal (bug 337801)
  • part 1 (View removal from Decks/XUL) done. (bug 655263)
• [AT RISK] Page Break Support
  • We de-prioritized Page Break in Q4 to work on other specs
• [AT RISK] CSS Ruby on mozilla-central
  • not currently assigned

Video

• [ON TRACK] MediaStream infrastructure landed on mozilla-central with Worker-based processing enabled and some media element integration
• [ON TRACK] libcubeb sound library replacing libsydneyaudio on mozilla-central
• [ON TRACK] fullscreen API enabled on mozilla-central
• [ON TRACK] direct pushing of video frames to compositor thread for e10s
• [ON TRACK] eliminate unnecessary copy with video decoder API changes

DOM

• [ON TRACK] Close the gap between what can be expressed in WebIDL and what our IDL tooling supports
• [ON TRACK] Make cycles involving weak maps and the DOM not leak
• [AT RISK] JS Compartment per global (carryover from last quarter, this may not be hittable due to timing of blocking bugs) -- at risk due to timing of blocking bugs
• [AT RISK] Have a real plan for what the new DOM bindings will look like -- at risk due to resource availability.
• [DONE] Review and land View Source rewrite
• [ON TRACK] Add support for the new mutation observer proposal (to replace DOM Mutation Event support eventually)
• [ON TRACK] Add support for (callable) event constructors

WebAPI

• [MISSED] Camera support landed (and maybe turned on)
• [MISSED] Basic camera in-page UI implemented. Not CSS configurable yet
• [ON TRACK] SMS landed. Might not have security model in place. Turned on for B2G
• [DONE] DOM-side of telephony done. Nothing turned on as we'll be missing radio part
• [ON TRACK] IndexedDB fully up to spec (including version API change, delete database, and arrays as keys, the last of which might be a stretch)
• [ON TRACK] File support in IndexedDB
• [ON TRACK] Have spec for how capability management in apps will work
• [ON TRACK] Battery and Network API on android and one other platform
• [DONE] Implement App-cache to current spec
• [ON TRACK] Contacts API spec (spec proposal only, no implementation)

JS

• [ON TRACK] Land incremental GC.
• [ON TRACK] Land Harmony modules.
• [ON TRACK] Land support for JS profiler.
• [ON TRACK] Shrink JSObject to ~5 words.

Accessibility

• [ON TRACK] Mobile: Accessibility enabled on FF android builds
• [ON TRACK] E10S: phase 2. All gecko-side a11y engine work done for parity with single process.
• [ON TRACK] Canvas accessibility: build accessible subtree.
• [ON TRACK] Improve accessible tree updating [bug 690417]
• Other activities: Addtional Telemetry, B2G test framework collab.

Multi-Process

• Continue regular tracking and resolution of short-term goals
• Remove the need for the --enable-e10s-compat build flag, so users can simply set a pref in Firefox to get multi-process tabs. Note that some or many features still may not work this quarter.
• Get windowless and windowed plugins working on all platforms.
• Identify which addons must continue to work to get 80% of users multi-process tabs
• Develop a plan for addon compatibility with content processes. (This may involve a combination of Firefox compatibility shims, porting addons to the Jetpack SDK, manual rewriting, or automatic rewriting).
• Measure the memory usage of multiple content processes and identify wasted space and a plan to correct any issues.
• Identify remaining issues which need input from the UX team for mobile and desktop, including panning responsiveness/checkerboarding tradeoffs (primarily mobile) and misbehaving/crashing content UI (desktop)

Perf

• [AT RISK] Valgrind developer ROM for pandaboard or Nexus S
• [AT RISK] linux "perf"-counters in zippity(depends on above ROM to have perf support in kernel)
• [ON TRACK] Bug 662444: exit(0) "immediate" shutdown prototype and a plan to land it
• [ON TRACK] Bug 686805: Incremental decompression for libxul on Android
• [ON TRACK] Startup-ordered binary on Windows
• deprioritized: 0 fennec sqlite fsyncs on first startup

Networking

• [DONE] Improve SSL performance and responsiveness by fixing bug 511393. This is also important for SPDY.
• [AT RISK] Add support for high-resolution timers on Windows, bug 676349. - PGO builds broken with the current patch
• [DONE] Improve dual-stack IPv6 experience by implementing an effective form of "happy eyeballs" IPv6 auto-detection at TCP open. This means resolving bug 684893.
• [AT RISK] Have full implementation of current WebSockets spec (hopefully final) implemented and in the tree in a shippable state.
• [ON TRACK] Land pipelining improvements from Patrick McManus.
• [DONE] Land SPDY implementation, bug 528288. OK if it remains pref'd off.
• [DONE] Work towards an effective mobile disk cache implementation.
  • Create a specific set of questions that need answering in order to make a plan.
  • Create system with which to measure cache performance locally.
    • Some microbenchmarks have been set up; WIP to analyze and understand results. See Necko/MobileCache/MicroBenchmarks for status
    • WIP for a test-driver to fetch whole pagesets (much like Talos, but necko-only)
  • Create a plan for a mobile disk cache based gathered data.
• [AT RISK] Improve App Cache support by resolving bug 538595 and bug 538588.
• [AT RISK] Resolve all networking security bugs that received a designation of sg:moderate or higher more than six weeks ago. This will become a permanent goal for the group.

Mobile

• NPAPI/Flash on Honeycomb integration and support
• Native front end prototype
• Automated Unit & Talos tests should be less than 5% unreliable (Matching desktop reliability)
• Achieve consensus on and create a reliable process for mobile responsiveness testing and evaluation (matrix, methods, analysis).
• Land on baseline numbers based on the above and create measurable perf targets through March 2012.
• Re-energize efforts to resolve mobile startup shrink issues
• Make more progress on Keyboard and IME bugs

B2G

• Gingerbread ROM with symbols for Galaxy S2 for Android Firefox debugging
• B2G ROM that can be used to build a basic phone (phone, contacts, vibrator, wifi, lock screen, etc).
• Basic Phone UI (Gaia) for B2G that can be used as primary phone for Mozilla developers

Research

• Rust: Release version 0.1
• Servo: Make DOM.js complete enough to run jQuery
• TC39: Implement modules in SpiderMonkey
• GPU Research: Investigate WebGL Video decoding