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16 Comments
- trib4lmaniac, on 04/11/2008, -1/+14FYI: Dromaeo was developed by the John Resig, author of the jQuery JavaScript library.
http://ejohn.org/blog/dromaeo-javascript-performan ... - dubness, on 04/11/2008, -1/+6Will John Resig never stop? That guy is a machine!
- davidarussell, on 04/22/2009, -1/+4Very nice utility, but it's the dinosaurs that make it rad!
- phytar, on 04/11/2008, -1/+3Oops, the URL got munged - here it is:
http://ejohn.org/blog/dromaeo-javascript-performan ... - rdrysdale, on 04/11/2008, -2/+4In case anyone missed it, the header moves, too. heh, fun dinos.
- comrade693, on 04/12/2008, -1/+3I see *one* comment that says that, and John replied to it here: http://ejohn.org/blog/dromaeo-javascript-performan ...
Excerpt:
@Gavin Brown: You didn't actually read the blog post or wiki page, did you? How about you take a gander through the methodology to get a feel for why SunSpider was inadequate. It's important to note the difference between a testing suite and a suite of tests, as well. Dromaeo will eventually include all of the tests that are in SunSpider, plus many more. The tests that SunSpider provided were adequate, for now (which is why we're standardizing on them) the suite, was not.
And as I mentioned in the post, we're working with the WebKit team - along with the other browser vendors - to standardize on a suite of tests. - phytar, on 04/11/2008, -1/+2You may want to look at the previous results:
http://wiki.mozilla.org/Dromaeo#Viewing_the_Result ... - sq377, on 04/11/2008, -0/+1On my linux system, epiphany with webkit ran a lot faster than firefox-3.0-b5 as well.
- Mislav, on 04/11/2008, -1/+2Read more in the Mozilla wiki: http://wiki.mozilla.org/Dromaeo
It documents much more stuff that aren't immediately obvious. - inactive, on 04/11/2008, -0/+1Hmmm, FFX3b5 beats Safari 3.1 by approx 150 ms in completing the entire battery of tests on my MacBook Pro 2.3GHz.
- bdash, on 04/12/2008, -0/+1Did you happen to miss the two comments from Maciej Stachowiak?
"""
I think Dromaeo's testing methodology has significant flaws in itself. First of all, it wraps every test in a closure, which factors out the performance of access to globals (something that actually matters for real scripts). Second, the way it determines two results are a "tie" is statistically unsound - you can't just check if two confidence intervals overlap, you have to do a two-variable t-test, which SunSpider does correctly. Third, running a test more times if the variance is higher than some threshold creates statistical artifacts - it's not good science to change an experiment midstream based on statistical results, and it makes it impossible to do statistical analysis on the totals since you can't meaningfully generate 5 totals if some tests ran more than 5 times. Fourth, Dromaeo seems to report much higher variance than SunSpider, so it is likely that the harness is interfering with the execution of the tests more than on SunSpider and creating noise.
""" - ryanscottdavis, on 04/19/2008, -0/+0i'm proud to say i went to the same school as Resig
- floor, on 04/11/2008, -2/+1On my dual G5 Mac, Safari was 3x faster than Firefox.
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http://boyfriendpillow.net/ - feedmeplz, on 04/11/2008, -4/+1So why did Mozilla go and build a completely separate JavaScript benchmark when the existing SunSpider benchmark, developed by the WebKit team, exists and is open source? The comments on John Resig's blog post indicate problems with the methodology of the new Mozilla benchmark (http://ejohn.org/blog/dromaeo-javascript-performan ... which weakens their claims of creating a "statistically sound" benchmark. The open and collaborative approach here would have been for Mozilla to collaborate with WebKit on their *existing* benchmark suite, rather than creating their own (even re-using many of the same tests) and then claiming to want to collaborate with other browser vendors. There's an awful lot of talk about "openness" and "collaboration" from Mozilla, but this goes to show that talk is all it is.
- Lazdude, on 04/11/2008, -5/+1I'm guessing Opera will outperform the rest, and Firefox will come out second best.
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