Re: [lmi] [PATCH] Trivial patch to avoid building unnecessary wxWidgets parts

[Greg Chicares]

On 2015-03-10 16:42, Vadim Zeitlin wrote:
> On Mon, 09 Mar 2015 22:18:57 +0000 Greg Chicares <address@hidden> wrote:
[...]
> GC> Okay, this task takes you nine or nine and a half minutes with four
> GC> logical CPUs, in a VM. I'm wondering how it can be that fast. Under
> GC> native msw-xp here, with all eight physical cores in use (sixteen if
> GC> we count hyperthreading, but we'll call it eight), I get:
> GC>  528.68s user 243.44s system 187% cpu 6:50.74 total
> GC> Seven minutes compared to your nine, but I use twice as many cores.
> GC> Mine are E5520 at 2.27 GHz, and yours are rather faster IIRC,
> 
>  Yes, mine is i7 3930K with a 3.2GHz base clock
> (http://ark.intel.com/products/63697/Intel-Core-i7-3930K-Processor-12M-Cache-up-to-3_80-GHz)
> so this probably already explains most, if not all, of the difference.

Thanks, now it all makes sense. These "CPU Mark" scores:
http://www.cpubenchmark.net/high_end_cpus.html
  12,115 3930K
   4,476 E5520
would suggest that one of your cores performs about as well as two of mine.
I throw twice as many at the same task and get about the same performance;
any remaining difference can be explained by VM overhead.

Hmmm...a supermicro 7048r-tr with dual eight-core e5-2630 v3's and 64 GB RAM
costs less than a dental implant...