Re: [PATCH 01/02/RFC] implement a stat cache

On Sun, Apr 20, 2008 at 12:13:46PM +0100, Luciano Rocha wrote:

An implementation of stat(2) and lstat(2) caching. Both the return code
and returned information are cached.

Signed-off-by: Luciano Rocha <redacted>
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On Sat, Apr 19, 2008 at 03:39:37PM -0700, Linus Torvalds wrote:

quoted

Yeah. I didn't look any further, but we do a total of *nine* 'lstat()' 
calls for each file we know about that is dirty, and *seven* when they are 
clean. Plus maybe a few more.

That's a lot. Why not use a stat cache?

With these changes, my git status . in WebKit changes from 28.215s to
15.414s.

git status . in git changes from 0.477s to 0.412s.

All tests under OS X.

-- 
Luciano Rocha [off-list ref]
Eurotux Informática, S.A. <http://www.eurotux.com/>