Revision as of 08:39, 24 March 2011

ARM/N900/Browser project

• build fennec according to these build instructions
• don't follow these outdated instructions, e.g. there are no patches needed
• before you wonder, the build is a out-of-sourcedir build, but using a directory on the same level as your sourcedir, so if you have the sources in ~/projects/mozilla-central, you will have the binaries in ~/projects/mozilla-central-mobile-qt-obj
• you can run the browser without installing:

~/projects/mozilla-central-mobile-qt-obj/mobile/dist/bin
./run-mozilla.sh ./fennec

• we can get extra info:

NSPR_LOG_FILE="mozdebug.log" NSPR_LOG_MODULES="all:5,timestamp" ./run-mozilla.sh >/dev/null 2>&1 ./fennec

observations

• there are lots of warnings and assertions, need to figure which of those are critical
• on x86 (Intel Core Duo) startup in a build with loggin enabled is about 4 seconds:
  • there are a few things that seem to be slower than usual ->

    Error creating thumbnail: Invalid thumbnail parameters

    

    fennec-qt startup trace

NSPR_LOG_FILE="mozdebug.log" NSPR_LOG_MODULES="all:3,timestamp,sync" ./run-mozilla.sh ./fennec
sort mozdebug.log >mozdebug.log2
moz-plot-timeline.py mozdebug.log2 -o mozdebug.png

to check

• do we have the recent version in the n900 repo?
  • the package in Trunk:Testing/devel:browser (seems the same) is two weeks old
  • the n900 images are using devel:browser
• Is the package using a proper mozconfig.
• my build above used these items in mozconfig:

ac_add_options --enable-debug="-g3"
ac_add_options --disable-optimize
ac_add_options --enable-logging
ac_add_options --disable-elf-dynstr-gc

• some potentially interesting options

ac_add_options --enable-mobile-optimize
ac_add_options --enable-optimize="-O2"
ac_add_options --enable-faststart

• are we using the bundled jpeg/png/zlib/bz2 libs, if not would that help?

ac_add_options --with-system-jpeg
ac_add_options --with-system-png
ac_add_options --with-system-zlib
ac_add_options --with-system-bz2
ac_add_options --enable-system-hunspell
ac_add_options --enable-system-sqlite
ac_add_options --enable-system-cairo
ac_add_options --enable-system-pixman

• what about disabling certain subsystems

ac_add_options --disable-installer
ac_add_options --disable-crashreporter
ac_add_options --disable-javaxpcom
ac_add_options --disable-printing

• test the AboutStartup extension on the device