[svn.haxx.se] · SVN Dev · SVN Users · SVN Org · TSVN Dev · TSVN Users · Subclipse Dev · Subclipse Users · this month's index

Re: [DISCUSS] delete ra_neon

From: Hyrum K Wright <hyrum.wright_at_wandisco.com>
Date: Wed, 16 May 2012 08:33:30 -0500

On Wed, May 16, 2012 at 8:15 AM, C. Michael Pilato <cmpilato_at_collab.net> wrote:
>...
> What to do about the commit Ev2 stuff?  Perhaps you or Hyrum can help us
> understand the scope of the performance cost paid by employing editor shims?

The primary performance cost paid by Ev2 is that the entire edit is
queued up during translation, and then replayed upon completion. Some
of this intermediate queuing happens in memory, other bits happen on
disk, but suffice it to say that for large commits, such intermediate
storage may be prohibitive. I don't think it would be a problem for
day-to-day work, but for large merges which are common in some
organizations I know of, such a performance penalty would be
prohibitive.

Greg's been hacking around in the shims, and has reduced this cost
somewhat, but there is still a O(n) additional resource use cost to
consumers of the shim code.

-Hyrum

-- 
uberSVN: Apache Subversion Made Easy
http://www.uberSVN.com/
Received on 2012-05-16 15:34:02 CEST

This is an archived mail posted to the Subversion Dev mailing list.