Mercurial Performance Problem

[Michael P. Soulier]

On 16/05/07 Guido Ostkamp said:

> Hello,
> 
> unfortunately I have quite a performance problem with Mercurial.
> My mercurial version is ba22e867cb23+20070510.
> 
> I changed a file in my large repository, then I tried a 
> 'hg diff pathname' on it.
> 
> This simple call took over 12 seconds on my Linux server 
> to complete.
> 
> I investigated using 'strace' and it appears Mercurial
> is using tons of lstat() and getdents() calls. In my case I 
> counted 29009 lstat64() and 4634 getdents64() calls. lstat
> is called for tons of files that have nothing to do with
> my change.
> 
> I have the same repository in Git. There I get the response
> in almost no time with just 12 lstat() calls and 2 getdents().
> 
> Can somebody have a look at this?

I recently noticed this myself. I had a ton of tmpfiles that were not under
source control, but hg did feel the need to lstat them all anyway, which
greatly slowed performance. 

Mike
-- 
Michael P. Soulier <msoulier at digitaltorque.ca>
"Any intelligent fool can make things bigger and more complex... It
takes a touch of genius - and a lot of courage to move in the opposite
direction." --Albert Einstein
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