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Re: [PATCH v2] xdiff/xprepare: improve O(n*m) performance in xdl_cleanup_records()

From
Marat Radchenko <marat@slonopotamus.org>
Date
Aug 27, 2011, 08:50 UTC
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:
Show 6 quoted lines
> 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
Previous: Marat Radchenko
Message 16 of 16 in “git diff is slow (--patience is fast)”
  1. Marat RadchenkoAug 9, 2011
  2. Tay Ray ChuanAug 9, 2011
  3. Marat RadchenkoAug 9, 2011
  4. Tay Ray ChuanAug 16, 2011
  5. xdiff/xprepare: improve O(n*m) performance in xdl_cleanup_records()Tay Ray Chuan, Aug 16, 2011
  6. Tay Ray ChuanAug 16, 2011
  7. Junio C HamanoAug 16, 2011
  8. xdiff/xprepare: improve O(n*m) performance in xdl_cleanup_records()Tay Ray Chuan, Aug 17, 2011
  9. Jeff KingAug 17, 2011
  10. Tay Ray ChuanAug 17, 2011
  11. Jeff KingAug 18, 2011
  12. Tay Ray ChuanAug 19, 2011
  13. Johannes SixtAug 21, 2011
  14. Marat RadchenkoAug 24, 2011
  15. Marat RadchenkoAug 24, 2011
  16. Marat RadchenkoAug 27, 2011

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