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Re: SQLite and callbacks

From: Stefan Sperling <stsp_at_elego.de>
Date: Tue, 8 Feb 2011 20:27:22 +0100

On Tue, Feb 08, 2011 at 05:13:50PM +0000, Hyrum K Wright wrote:
> On Tue, Feb 8, 2011 at 4:15 PM, Stefan Sperling <stsp_at_elego.de> wrote:
> > On Tue, Feb 08, 2011 at 04:34:52PM +0100, Bert Huijben wrote:
> >> There is nobody actively working on status and there are no open
> >> issues on status to block branching...
> >
> > There's the general wc-ng performance issue (but I don't think it has
> > an issue number attached to it right now).
> If performance of 'status' is a release blocker, we need to document
> and treat it as such.
> Also instead of nebulous handwaving about "performance is bad", it
> would be nice to have actually datasets and actual numbers. We have a
> VM at the ASF which could be used for hosting a set of benchmarking
> data; we just need somebody to put together the data and write the
> scripts which run the benchmarks.

I'll ask Neels about running his set of performance tests on the VM
(see http://svn.haxx.se/dev/archive-2010-09/0526.shtml).

I know he's not following dev@ closely ATM, but maybe he'll see this one
anyway cause his name is in it -- but I can more easily catch his attention
by waving across the yard from my kitchen window :)

> [And yes, I realize that I bring up all these points without actually
> I've been pleading with folks I know who use large working copies to
> do some testing, but I haven't gotten any feedback from them, partly
> because following up with everybody is kind of a pain, and partly
> because there aren't any packaged binaries for people to test. Would
> it be worth it to have a beta-testers_at_subversion.apache.org list,
> which we could use to communicate with the bleeding-edge folks in
> release situations like this?
> It shouldn't be difficult to create a large working copy ('svn co
> ^/subversion') and use that for testing, but getting more insight than
> just our own dataset would be very nice.

We'll find some way to test with large WCs, no doubt.

In any case, I think that changing our code to use sqlite more
effectively, in the manner suggested by Branko, is the way to go.
The approach would also allow us to address Stefan Küng's requests
in http://svn.haxx.se/dev/archive-2011-02/0104.shtml for APIs that
quickly pull various information from the DB.

Received on 2011-02-08 20:28:05 CET

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