Re: speed

[Phil Holmes]

----- Original Message ----- 
From: "Knut Petersen" <address@hidden>
To: "Carlo Stemberger" <address@hidden>
Cc: <address@hidden>
Sent: Tuesday, April 30, 2013 10:46 AM
Subject: Re: speed


> On 07.02.2013 13:52, Carlo Stemberger wrote:
> > $ time make
> >
> > [...]
> >
> > real    0m14.519s
> > user    0m14.276s
> > sys    0m0.192s
> >
> >
> > i7-3770K (3rd generation), Debian Wheezy.
>
> cpu/men: Pentium-M Dothan, 1.86 GHz, 2GB
> mobo: AOpen i915GMm-HFS
> os: openSuSE 12.3, kernel 3.9
> lilypond: 16.2
>
> time make
> [...]
> real    1m5.877s
> user    1m0.884s
> sys     0m1.004s
>
> About 4 times slower than your "Ivy Bridge" system.
> Half of that can be accounted to the doubled clock rate.
> I suspect that a lot of the rest is caused by general
> improvements in cpu architecture. So lilypond seems
> not to scale well with the number of available cores.

Generally, it does.  Read 
http://lilypond.org/doc/v2.17/Documentation/contributor/saving-time-with-the-_002dj-option

--
Phil Holmes