Re: Avoid la files.

[Bob Friesenhahn]

On Thu, 13 Dec 2007, Ralf Wildenhues wrote:
> > Maybe we can try on a linux box, w32 won't work, since i don't have my
> > patches ported for HEAD ;o(
>
> Yes, that should be sufficient.  I can't tell you yet whether it would
> help, though, as I'm not yet sure about the actual problem cause.

Something that many people are not aware of is that 'dtrace' (as found 
in Sun's Solaris 10 and Apple's OS X Leopard) may be used to 
investigate performance problems in libtool.  I mention this because I 
have never seen it mentioned on any autotools list before.  Carefully 
crafted dtrace scripts can identify which programs are being executed, 
how many times they are executed, how long the execution took, the 
arguments which produced the longest run times, and which program was 
responsible for executing them.  Virtually anything may be analyzed 
using 'dtrace'.

I have not had any spare time for months now, but I did try running 
dtrace on a shell script I have here and I quickly learned that the 
shell was executing some of its startup ("dot") files and so some 
shell code was being needlessly executed over and over.  Something 
which had not been obvious to me became immediately obvious due to 
using dtrace.

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/