Firefox/Projects/Startup Time Improvements/joelr notes: Difference between revisions

Firefox/Projects/Startup Time Improvements/joelr notes (view source)

Revision as of 21:24, 26 August 2009

3,460 bytes added , 26 August 2009

→‎August 26, 2009

Joel Reymont

109

edits

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 All timings are in microseconds and specific to my Apple 256Gb SSD.
+There's something else that I discovered during my snooping around with io.d. Compare the first 20 seconds of [http://gist.github.com/175843 the life of Safari] and [http://gist.github.com/175842 the life of Firefox].
+Basically, all the shared libraries used by Safari are pulled in from the dynamic library shared cache. Safari uses mostly system frameworks, e.g.
+<pre>
+DYLD_PRINT_LIBRARIES_POST_LAUNCH=1 /Applications/Safari.app/Contents/MacOS/Safari
+dyld: loaded: /System/Library/CoreServices/RawCamera.bundle/Contents/MacOS/RawCamera
+dyld: loaded: /System/Library/PrivateFrameworks/Shortcut.framework/Versions/A/Shortcut
+dyld: loaded: /System/Library/PrivateFrameworks/HelpData.framework/Versions/A/HelpData
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCSync.A.dylib
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCGATS.A.dylib
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libRIP.A.dylib
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCGXCoreImage.A.dylib
+</pre>
+whereas Firefox uses a whole lot more custom shared libraries, e.g.
+<pre>
+DYLD_PRINT_LIBRARIES_POST_LAUNCH=1 ./Minefield.app/Contents/MacOS/firefox-bin -no-remote -foreground -P 2
+dyld: loaded: /Users/joelr/Work/mozilla/startup/Minefield.app/Contents/MacOS/components/libbrowserdirprovider.dylib
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/ATSHI.dylib
+dyld: loaded: /Users/joelr/Work/mozilla/startup/Minefield.app/Contents/MacOS/components/libbrowsercomps.dylib
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCGATS.A.dylib
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libRIP.A.dylib
+dyld: loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCSync.A.dylib
+dyld: loaded: /System/Library/PrivateFrameworks/Shortcut.framework/Versions/A/Shortcut
+dyld: loaded: /System/Library/PrivateFrameworks/HelpData.framework/Versions/A/HelpData
+dyld: loaded: /Users/joelr/Work/mozilla/startup/./Minefield.app/Contents/MacOS/libnssdbm3.dylib
+dyld: loaded: /Users/joelr/Work/mozilla/startup/./Minefield.app/Contents/MacOS/libfreebl3.dylib
+dyld: loaded: /Users/joelr/Work/mozilla/startup/Minefield.app/Contents/MacOS/libnssckbi.dylib
+dyld: loaded: /System/Library/CoreServices/RawCamera.bundle/Contents/MacOS/RawCamera
+dyld: loaded: /Library/Internet Plug-Ins/QuickTime Plugin.plugin/Contents/MacOS/QuickTime Plugin
+dyld: loaded: /System/Library/QuickTime/QuickTimeComponents.component/Contents/MacOS/QuickTimeComponents
+dyld: loaded: /System/Library/Frameworks/AGL.framework/Versions/A/AGL
+dyld: loaded: /System/Library/PrivateFrameworks/CoreAUC.framework/Versions/A/CoreAUC
+dyld: unloaded: /Users/joelr/Work/mozilla/startup/Minefield.app/Contents/MacOS/libnssckbi.dylib
+</pre>
+What needs to be done to make Firefox use the dynamic library shared cache as aggressively as Safar?
 = Previous statuses =