Re: dyld shared cache: firefox vs safari
Re: dyld shared cache: firefox vs safari
- Subject: Re: dyld shared cache: firefox vs safari
- From: Joel Reymont <email@hidden>
- Date: Thu, 27 Aug 2009 09:00:18 +0100
On Aug 27, 2009, at 2:49 AM, Greg Parker wrote:
DYLD_PRINT_STATISTICS may also be useful in identifying where your
startup time is going.
I have the stats for Firefox [1] and Safari [2], using the dyld shared
cache. I don't know if I'm reading this correctly but it seems that
Firefox goes through dyld more than twice as fast as Safari!
Is there anything in the stats below that can hint at slowness?
Thanks, Joel
---
[1] Firefox dyld stats
total time: 49.1 milliseconds (100.0%)
total images loaded: 106 (93 from dyld shared cache, 56 needed no
fixups)
total segments mapped: 49, into 5903 pages with 684 pages pre-fetched
total images loading time: 9.5 milliseconds (19.4%)
total rebase fixups: 149,011
total rebase fixups time: 4.1 milliseconds (8.4%)
total binding fixups: 24,932
total binding symbol lookups: 797, average images searched per symbol:
2.3
total binding fixups time: 4.3 milliseconds (8.7%)
total bindings lazily fixed up: 45 of 19,109
total init time time: 31.1 milliseconds (63.3%)
total images with weak exports: 3
[2] Safari dyld stats
total time: 105.3 milliseconds (100.0%)
total images loaded: 116 (114 from dyld shared cache, 114 needed no
fixups)
total segments mapped: 5, into 30 pages with 10 pages pre-fetched
total images loading time: 3.6 milliseconds (3.4%)
total rebase fixups: 1,298
total rebase fixups time: 0.1 milliseconds (0.0%)
total binding fixups: 2,476
total binding symbol lookups: 234, average images searched per symbol:
1.6
total binding fixups time: 6.3 milliseconds (6.0%)
total bindings lazily fixed up: 3 of 901
total init time time: 95.2 milliseconds (90.4%)
total images with weak exports: 1
---
fastest mac firefox!
http://wagerlabs.com
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