i7 920 not quite twice as fast as Q9300 at building wine
Lei Zhang
thestig at google.com
Wed Mar 24 03:08:26 CDT 2010
On Tue, Mar 23, 2010 at 4:11 PM, Dan Kegel <dank at kegel.com> wrote:
> Not as exciting an improvement as I'd hoped:
>
> 4 GB RAM
> Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz
> make -j5
> real 7m35.985s
> user 24m54.741s
> sys 3m15.628s
>
> 6 GB RAM
> model name : Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
> make -j9
> real 4m39.577s
> user 30m43.651s
> sys 2m30.109s
Even though Nehalem is a better architecture, you don't get the 2x (or
better) speed up because the extra 4 cores are from hyperthreading.
With 8 real Nehalem cores and -j9, I got 3m24s. With 8 cores +
hyperthreading, I get 2m49s.
And now to figure out how much electricity I just used... ;-)
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