LET 's start with the Numbers. Vlad passed some clip mensurate warm startup on the Mack, and it looks really nice: Firefox3.6 commences upwards about 10 % faster than3.5, and3.7 gets upwards somely 20 % faster than3.5. I mensurate both cold and warm startup on Windows 7, and the ikon is not so rose-colored there. Warm startup is fundamentally level across3.5,3.6 and3.7, in my tryouts. Cold startup is... goodly, Weird. Let me to explicate...
My cold startup methodology is simple: On a fundamentally clean install of Windows 7, I 'd make a new profile, get the browser upwards, shut it so boot. So I 'd mensurate Firefox startup clip after the OS settled. So I 'd make that reboot-and-measure measure a cluster more times. Yes, suchly merriment. I mensurate Firefox startup clip applying the method Vlad posted to his blog. This makes n't make anything to avoid OS optimizations that might run across reboots, which is a possible fault, as you 'll see below.
Firefox 3,3.6 and3.7 all holded consistent Numbers across their runs. Yet, Firefox3.5 exhibited a unequaled conduct: The first two cold starts were appropriately slow, similar to the cold startup times of the other versions. The subsequent runs were *very* fast for a cold start! I boot a couple of times, and got other versions a couple of times, so assay a series of3.5 runs again... and saw the same thing: the first two runs were in the park of other Firefox versions, but subsequent runs were unbalanced fasting. Vlad was speaking before in the hebdomad about a prognosticative optimisation characteristic that Windows holds, acquiring from an application 's doings to optimise it Holds performance. Maybe that characteristic works fantastically with Firefox3.5, and for whatever ground makes not work nighly too with old or subsequent versions of the app? I 've clearly traversed into the kingdom of phantasy here, so alternate theories are welcome. Mayhap I should round-robin through all versions alternatively of making successive runs of the same version.
Firefox3.5 aside, when mensurate cold startup I besides see the fixation that Drew blogged about
We 'll get a bug registered and assist from QA to get a fixation reach for this.
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