Re: i7 920 not quite twice as fast as Q9300 at building wine

[Lei Zhang]

On Tue, Mar 23, 2010 at 4:11 PM, Dan Kegel  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... ;-)