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Mobile/StartupOptimization: Difference between revisions
→Task list
(New page: == Issues == == Goals == == Task list == === Bugs === === Features ===) |
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== Issues == | == 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 == | == Goals == | ||
Initial goal: Reduce startup time as perceived by the user to less than 3s. | |||
== Task list == | == Task list == | ||
Here are some potential optimizations: | |||
* Startup bugs | |||
** | |||
[https://bugzilla.mozilla.org/show_bug.cgi?id=121341] | |||
[https://bugzilla.mozilla.org/show_bug.cgi?id=433098] | |||
* Improve fastload performance | |||
** Filed bug 412796 [https://bugzilla.mozilla.org/show_bug.cgi?id=412796] | |||
* Optimize mobile chrome | |||
** UI design | |||
** [[Mobile/XULOptimization|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 [https://bugzilla.mozilla.org/show_bug.cgi?id=406810] | |||
* 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) | |||
** Bug 421561 [https://bugzilla.mozilla.org/show_bug.cgi?id=421561] | |||
* removing comments from all evaluated source files (js, css, xul). Less to read in. | |||
** Bug 463066 [https://bugzilla.mozilla.org/show_bug.cgi?id=463066] | |||
* look at what system libraries are being opened on start. strace shows we looking around for system version of nspr, nss, ect? Maybe we can help the dso loader. | |||
** Bug needed. | |||
* look at what locales are being loaded in. strace shows we are loading in locales that are not needed at startup. | |||
** Bug needed | |||
* merge all XPT files. | |||
** Bug 469873 [https://bugzilla.mozilla.org/show_bug.cgi?id=469873] | |||
* Can JS files be precomputed/precompiled? | |||
** bug needed. | |||
* Reduce chrome files. For a XUL runner app, we do not pageloader for example. There are others. This should be included in make package. | |||
** bug needed. | |||
* Reduce js files. there are probaby some js completes that we do not need. (default command line handling, for example). | |||
** Bug 468607 [https://bugzilla.mozilla.org/show_bug.cgi?id=468607] | |||
* Is sqllite doing a bunch of unneeded F_SETLK64s (fcntl64)? Maybe we do not have to be so overly protective of other writers? | |||
** bug needed | |||
* Does XR need the hiddenWindow? starting this takes times. | |||
** bug needed | |||
=== Bugs === | === Bugs === | ||