Mike Cramer | 14 Mar 16:05 2009
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FF3.1beta3 in Peacekeeper performance test

Hi,

I follow the impressive performance improvements of FF very closely, but 
today I saw a new performance test which I could not believe.
http://www.futuremark.com/pressroom/pressreleases/55300/

"..Peacekeeper measures your browser's performance by testing its 
JavaScript functionality. ..."

The following features are tested:
http://service.futuremark.com/peacekeeper/faq.action

As result they show this
http://www.heise.de/mobil/Neuer-Benchmark-fuer-Internetbrowser--/zoom/134567/0

which means that FF 3.1b3 is only ~1/2 as fast as safari 4.0

I tried this test on my mac pro (2,4ghz, 4gb) and I got the following 
results:
Safari 3.2.1   791points
FF3.1beta3     592points

Has anyone an explaination why FF3.1 performs so poor in this test, 
because sofar I saw only tests where FF3.1 was only faster or fast as 
chrome.

Regards,
Mike
Boris Zbarsky | 15 Mar 02:41 2009
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Re: FF3.1beta3 in Peacekeeper performance test

Mike Cramer wrote:
> "..Peacekeeper measures your browser's performance by testing its 
> JavaScript functionality. ..."

That's not what it tests.

> The following features are tested:
> http://service.futuremark.com/peacekeeper/faq.action

Right.

> As result they show this
> http://www.heise.de/mobil/Neuer-Benchmark-fuer-Internetbrowser--/zoom/134567/0 

Which is semi-meaningless, since they don't ever explain how they 
compute those numbers.

 > which means that FF 3.1b3 is only ~1/2 as fast as safari 4.0

No, it means their scoring function, which they never explain, assigned 
it half as high a score.  What that means in practice depends on what 
that function is.  If you can get them to tell you that, I'd love to 
know the results.

> I tried this test on my mac pro (2,4ghz, 4gb) and I got the following 
> results:
> Safari 3.2.1   791points
> FF3.1beta3     592points

Which means what?
(Continue reading)

Boris Zbarsky | 15 Mar 02:42 2009
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Re: FF3.1beta3 in Peacekeeper performance test

Mike Cramer wrote:
> Has anyone an explaination why FF3.1 performs so poor in this test, 
> because sofar I saw only tests where FF3.1 was only faster or fast as 
> chrome.

Oh, and the key here is that you must have been looking at JavaScript 
performance tests, whereas this thing is mostly not testing performance 
of the JavaScript language itself.

-Boris
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