Re: git and larger trees, not so fast?

From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Aug 9, 2007, 17:54 UTC
Message-ID: <alpine.LFD.0.999.0708091051290.25146@woody.linux-foundation.org>
In-Reply-To: <alpine.LFD.0.999.0708090948250.25146@woody.linux-foundation.org>

On Thu, 9 Aug 2007, Linus Torvalds wrote:

Show 6 quoted lines

> 
> We seem to spend a lot of our time in memcpy:
> 
> 	samples  %        image name               app name                 symbol name
> 	200527   25.4551  libc-2.6.so              libc-2.6.so              _wordcopy_bwd_aligned
> 	104505   13.2660  libc-2.6.so              libc-2.6.so              _wordcopy_fwd_aligned

Sorry, that was a bogus trace with some old stuff in it.

The real profile was this one.

	102343   73.1377  libc-2.6.so              libc-2.6.so              _wordcopy_bwd_aligned
	3573      2.5534  git                      git                      cache_name_compare
	2328      1.6637  git                      git                      index_name_pos
	...

which matches the rest of my emails.. (the "73%" is actually really supposed to be about 95%, but I had X running and doing stuff at the same time, so it was only 73% of all the other CPU activity that was going on over the time I profiled).

		Linus