From: Marat Radchenko <marat@slonopotamus.org>
Date: Sat, 27 Aug 2011 08:50:31 GMT
Subject: Re: [PATCH v2] xdiff/xprepare: improve O(n*m) performance in xdl_cleanup_records()
Message-ID: <1314435031.9095.2.camel@n900.home.ru>
In-Reply-To: <1313546037-4104-1-git-send-email-rctay89@gmail.com>

On ср 17 авг 2011 05:53:57 MSD, Tay Ray Chuan <rctay89@gmail.com> wrote:

> In xdl_cleanup_records(), we see O(n*m) performance, where n is the
> number of records from xdf->dstart to xdf->dend, and m is the size of a
> bucket in xdf->rhash (<= by mlim).
> 
> Here, we improve this to O(n) by pre-computing nm (in rcrec->len(1|2))
> in xdl_classify_record().

Thanks for your patch, btw, now diff is much faster