在 2009年10月20日星期二 UTC+8上午10:07:02，Boris Zbarsky写道： > On 10/19/09 1:37 AM, Boris Zbarsky wrote: > > I'm going to try to get some numbers from our Tp set as well > > tp for non-XUL nodes histograms are below. Summary: For the "LHS" > case, 80% of RuleProcessorData only need tag/namespace/id/class to not > match. Anothe 12% are only matched against one selector after matching > on tag/namespace/id/class. > > For the "RHS" case, the numbers are 72% and 73% respectively. For the > RHS case, also, just the tag+namespace accounts for a pretty high > proportion of non-matches (60%). > > There are 2.25 times as many "LHS" datas as "RHS" ones. > > Since RHS datas always need the tag/id/classes due to ContentEnumFunc > needing that information, I propose we stick to eagerly getting those in > the RuleProcessorData ctor for now but switch to lazily getting > mIsLink/mLinkState and mEventState. Will file a bug on this. > > Raw data: > > mean Matches against LHS selectors 37.6586, std. deviation 81.5598, max 933 > [ 0]: 0 > [ 1]: 2828614 ********************** > [ 2]: 1750936 ********************* > [ 3, 4]: 1960725 ********************* > [ 5, 8]: 1862980 ********************* > [ 9, 16]: 2247511 ********************** > [ 17, 32]: 3441357 ********************** > [ 33, 64]: 1546569 ********************* > [ 65, 128]: 622194 ******************** > [ 129, 256]: 123740 ***************** > [ 257, 512]+ 104106 ***************** > > mean Matches against non-tag LHS selectors 22.8737, std. deviation > 40.857, max 738 > [ 0]: 1337259 ******* > [ 1]: 2985507 ******* > [ 2]: 1246616 ******* > [ 3, 4]: 1984317 ******* > [ 5, 8]: 2052932 ******* > [ 9, 16]: 2990938 ******* > [ 17, 32]: 2641725 ******* > [ 33, 64]: 998051 ****** > [ 65, 128]: 142351 ****** > [ 129, 256]: 100812 ****** > [ 257, 512]+ 8224 **** > > mean Matches against non-tag non-class non-id LHS selectors 0.713781, > std. deviation 3.45092, max 130 > [ 0]: 13125146 ************************ > [ 1]: 2022830 ********************* > [ 2]: 431570 ******************* > [ 3]: 186678 ****************** > [ 4]: 161101 ****************** > [ 5]: 97153 ***************** > [ 6]: 62568 **************** > [ 7]: 37605 **************** > [ 8]: 62699 **************** > [ 9]: 45887 **************** > [ 10]+ 255495 ****************** > > mean Matches against RHS selectors 19.8253, std. deviation 48.354, max 986 > [ 0]: 1389274 ******* > [ 1]: 1838839 ******* > [ 2]: 155109 ****** > [ 3, 4]: 168683 ****** > [ 5, 8]: 2058315 ******* > [ 9, 16]: 732783 ****** > [ 17, 32]: 438646 ****** > [ 33, 64]: 293408 ****** > [ 65, 128]: 192554 ****** > [ 129, 256]: 41034 ***** > [ 257, 512]+ 6984 **** > > mean Matches against non-tag RHS selectors 15.104, std. deviation > 45.6789, max 960 > [ 0]: 4403536 ******* > [ 1]: 576197 ****** > [ 2]: 149844 ****** > [ 3, 4]: 63938 ***** > [ 5, 8]: 528818 ****** > [ 9, 16]: 711039 ****** > [ 17, 32]: 430642 ****** > [ 33, 64]: 278387 ****** > [ 65, 128]: 134934 ****** > [ 129, 256]: 31510 ***** > [ 257, 512]+ 6784 **** > > mean Matches against non-tag non-class non-id RHS selectors 14.416, std. > deviation 45.6187, max 960 > [ 0]: 5252708 ******* > [ 1]: 74599 ***** > [ 2]: 19193 ***** > [ 3, 4]: 76845 ***** > [ 5, 8]: 337087 ****** > [ 9, 16]: 687484 ****** > [ 17, 32]: 417248 ****** > [ 33, 64]: 277267 ****** > [ 65, 128]: 137064 ****** > [ 129, 256]: 29350 ***** > [ 257, 512]+ 6784 **** > > -Boris
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