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From: Thorsten Kampe <thorsten AT thorstenkampe DOT de>
Subject:  Re: [ANNOUNCEMENT] Updated: [experimental] cygwin-1.5.25-1
Date:  Sat, 24 Nov 2007 13:09:39 -0000
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* Christopher Faylor (Fri, 23 Nov 2007 12:38:30 -0500)
> On Fri, Nov 23, 2007 at 12:32:58PM -0500, Christopher Faylor wrote:
> >On Fri, Nov 23, 2007 at 05:04:38PM -0000, Thorsten Kampe wrote:
> >>* Christopher Faylor (Fri, 23 Nov 2007 11:25:50 -0500)
> >>> On Thu, Nov 22, 2007 at 06:05:49PM -0000, Thorsten Kampe wrote:
> >>> >* Corinna Vinschen (Thu, 22 Nov 2007 16:42:10 +0100)
> >>> >>            ==== CYGWIN THANKSGIVING EDITION ====
> >>> >> 
> >>> >> I've made the new version of the Cygwin DLL, 1.5.25-1, and associated
> >>> >> utilities available for testing.  Version 1.5.24-2 remains the current
> >>> >> version for now.
> >>> >> 
> >>> >> This is a bug fix release.  Important changes since 1.5.24-2:
> >>> >
> >>> >Unfortunately the changes that made rsync run about 2 - 6 times faster
> >>> >[1] (on a backup of about 100,000 files residing on a FAT32 volume) 
> >>> >didn't make it into the prelease.
> >>> >
> >>> >The first snapshot that exhibited the stunning increase was the 
> >>> >snapshot from 2007-08-02 and the last one was the snapshot from 2007-
> >>> >08-13.
> >>> >
> >>> >[1] http://thread.gmane.org/gmane.os.cygwin/91350/focus=91509
> >>> 
> >>> So, does this mean that the snapshot was faster and then it wasn't?
> >>
> >>Yes, all the snapshots between 2007-08-02 and 2007-08-13 were much 
> >>faster. You remarked "does rsync use pipes by any chance? If so, that 
> >>may be at least part of the reason since that code has been revamped."
> >
> >Yes.  I read and recall my comments.  Since I didn't remove any of the
> >pipe code, if it is now slower, then I don't understand what caused the
> >slowdown.
> 
> Also, just for clarity, are you saying that 2007-08-13 was fast but
> 2007-08-31 was not?

Yes. And I tried every snapshot after that. I realise that you (or 
Corinna) might have better things do than looking into a speed 
increase with one application (rsync) that only I have noticed.

If there is a real chance for figuring this out I would verify my 
observations again - especially that the first "fast" snapshot was 
2007-08-02 and the last "fast one" 2007-08-13 and some concrete 
figures about the speed increase.

Thorsten


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