bzr too slow

[John Arbash Meinel]

Martin Pool wrote:
> On 10 Jan 2006, James Blackwell <jblack at merconline.com> wrote:
> 
>>On Tue, Jan 10, 2006 at 05:43:31PM +1100, Martin Pool wrote:
>>
>>>On 10 Jan 2006, Erik B?gfors <zindar at gmail.com> wrote:
>>>
>>>>Hello
>>>>
>>>>When trying to use bzr for real stuff, I've noticed that it's way to
>>>>slow.  We have a svn repo that's 45MB and over 6000 files in it. It
>>>>takes 11m46 to run "bzr status".
>>>
>>>That is indeed pretty slow.  Could you please run 'bzr --profile status'
>>>in there and report what it says?
>>
>>I'm wondering if he has cElementTree. Can't that affect status?
> 
> 
> It shouldn't be that bad.  Robert suggests it may be the
> inventory-traversal inefficiency ddaa spoke of a while ago - David,
> could you post your patch please?
> 

It could be a few things. At one point, the hash-cache wasn't properly
flushing to disk, so it was having to read all files over again.
I thought Aaron submitted a fix for this, and it had been pulled in.

I wrote a branch which cached stat calls, which did seem to help, though
not as much as one would like.

On really large trees, I found that the painful part was actually the
'is_ignored()' call. Because on my tree, the build was in-tree (so you
have a lot of ignored *.o files), and then I had to explicitly ignore a
lot of the executables. So I had something like 50 ignore rules, coupled
against about a thousand *.o files, caused a lot of iterations of the
is_ignored loop.

I am curious what --profile will report.
John
=:->

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