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XUL requires significant memory. On the N800, trunk Firefox with the standard chrome requires ~10MB RAM on startup, and this reduces to ~6.5MB with a simpler chrome. This indicates significant RAM use by XUL.


Reduce startup RAM requirement to ~5 MB on the N800. This matches the Maemo browser's RAM needs on startup.

Task list

  • Profile individual XUL widgets -- avoid expensive XUL widgets in Mobile Chrome
  • Optimize XPCOM objects used by XUL widgets


XUL Profiling