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Re: svn commit: r1335639 - /subversion/trunk/subversion/libsvn_wc/adm_ops.c

From: Mark Phippard <markphip_at_gmail.com>
Date: Tue, 8 May 2012 14:49:27 -0400

On Tue, May 8, 2012 at 2:45 PM, C. Michael Pilato <cmpilato_at_collab.net> wrote:
> On 05/08/2012 02:34 PM, Mark Phippard wrote:
>> Now that I can run the test I wanted, the performance improvement is
>> pretty nice.  Checking out our code goes from 1m35s down to 0m44s.  I
>> cannot help but think that number should still be a lot lower though.
>> This scenario seems like it would be very similar to what a Git
>> checkout would do now, probably even less work has to be done.  I do
>> not have a Git-svn version of our codebase to test with, but I am
>> guessing a Git checkout of our code would be less than 10 seconds.  So
>> it might be an indication we could be doing more optimization in our
>> libraries.
>> That said, I still think it is a nice improvement and I imagine it
>> would scale up and down based on size and number of files.
>> Does anyone have a git version of our tree they could try this with?
>> How long does it take git to materialize a working copy of our trunk?
> As I said before, I suspect your numbers would be much lower if I wasn't
> sending HEAD requests for each file.  Unfortunately, ra_serf is depending on
> the ordering of the pipelined requests (PROPFIND results for a given path
> must be processed before the contents of the file are fetched), and I don't
> know how to make that happen without ripping apart the pipelining machinery
> and doing something custom there.

Now that it works for me, I will try it some more with my own server
so I can check the logs. When I was trying this before, it seemed
like all of the HEAD requests were sent in the first second (which I
thought was also producing the open files problem?). So I am
operating under the theory that we are still kind of slow in
installing the file from our pristine store.

I assume that if I have a 44 second checkout, then I should see HEAD
requests in the server logs happening during most of that 44 seconds
if that is contributing to the problem?

Mark Phippard
Received on 2012-05-08 20:49:59 CEST

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