Mobile/StartupOptimization

Issues

Trunk Firefox takes ~15s to show the main window on the N800. With a simpler chrome it reduces to about 8s. The Maemo browser on the same hardware takes ~3s, and Safari (iPod Touch) takes less than a second.

Goals

Initial goal: Reduce startup time as perceived by the user to less than 3s.

Task list

Here are some potential optimizations:

• Improve fastload performance
  • Filed bug 412796 [1]
• Optimize mobile chrome
  • UI design
  • XUL Optimizations
• Function re-ordering
  • Streamline memory access by placing all code & data needed for start-up in contiguous sections at the start of the binary.
• Optimize memory allocation
  • Significant time during startup is in memory allocations. Need link to ongoing work.
• Optimize startup hotspots
  • Bug 406810 [2]
• Preload Mozilla libraries
  • Preload all libraries during startup; launching Firefox only loads the XUL application.
• Preload Mozilla application
  • Launch Mozilla during device startup and keep in background (no visible window). Launching Firefox will only open a new window.
• Identify & disable unnecessary work during startup (for mobile)
  • DougT can you please add any related bugs here?