Re: [patch] massive libtool speedup for large libs
Re: [patch] massive libtool speedup for large libs
- Subject: Re: [patch] massive libtool speedup for large libs
- From: Scott Wheeler <email@hidden>
- Date: Tue, 06 Mar 2007 16:49:30 +0100
Scott Wheeler wrote:
Scott Wheeler wrote:
I'd hoped this would land somewhere that could eventually make it into
the official version, but the response to the first version was rather
underwhelming.
Now I notice that there were several weeks later a couple of replies
(I'd turned off mail delivery after a couple of weeks):
But even without the zero byte writes, performing a system call for
writing anything less than 32KB or so is asking for slow performance.
I'd thought about the same thing and considered doing my own buffering,
but I compared the speed of my patched libtool with simply copying the
library using cp. The difference was small (a few seconds in an
operation that took a couple of minutes) and naturally there's more than
just the system calls using CPU time, leading me to conclude that the
system call overhead wasn't worth attempting to optimize out. This
might have been different were the library small enough to fit
completely into disk buffers, but I'm somewhat dubious.
-Scott
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