Re: Generate unique ID for URL

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Date	Wed, 14 Nov 2012 01:59:53 +0100
From	Christian Heimes <christian@python.org>
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To	Richard Baron Penman <richardbp@gmail.com>
Subject	Re: Generate unique ID for URL
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Am 14.11.2012 01:41, schrieb Richard Baron Penman:
> I found the MD5 and SHA hashes slow to calculate.
> The builtin hash is fast but I was concerned about collisions. What
> rate of collisions could I expect?

Seriously? It takes about 1-5msec to sha1() one MB of data on a modern
CPU, 1.5 on my box. The openssl variants of Python's hash code release
the GIL so you use the power of all cores.

Thread

Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 15:20 -0800
  Re: Generate unique ID for URL John Gordon <gordon@panix.com> - 2012-11-13 23:34 +0000
    Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 15:56 -0800
      Re: Generate unique ID for URL Chris Kaynor <ckaynor@zindagigames.com> - 2012-11-13 16:26 -0800
      Re: Generate unique ID for URL Richard Baron Penman <richardbp@gmail.com> - 2012-11-14 11:41 +1100
        Re: Generate unique ID for URL Johannes Bauer <dfnsonfsduifb@gmx.de> - 2012-11-14 10:44 +0100
          Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-14 03:14 -0800
      Re: Generate unique ID for URL Christian Heimes <christian@python.org> - 2012-11-14 01:43 +0100
        Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 16:50 -0800
          Re: Generate unique ID for URL Christian Heimes <christian@python.org> - 2012-11-14 02:05 +0100
      Re: Generate unique ID for URL Christian Heimes <christian@python.org> - 2012-11-14 01:59 +0100
        Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 17:18 -0800
        Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 17:18 -0800
  Re: Generate unique ID for URL Miki Tebeka <miki.tebeka@gmail.com> - 2012-11-13 16:13 -0800
    Re: Generate unique ID for URL Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-11-14 02:04 +0000
      Re: Generate unique ID for URL Steve Howell <showell30@yahoo.com> - 2012-11-13 18:32 -0800
        Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 19:12 -0800
  Re: Generate unique ID for URL Roy Smith <roy@panix.com> - 2012-11-13 20:39 -0500
    Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 19:25 -0800
      Re: Generate unique ID for URL Roy Smith <roy@panix.com> - 2012-11-13 22:38 -0500
        Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 19:56 -0800
      Re: Generate unique ID for URL Chris Angelico <rosuav@gmail.com> - 2012-11-14 15:06 +1100
        Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 20:14 -0800
        Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 20:14 -0800
    Re: Generate unique ID for URL Richard <richardbp@gmail.com> - 2012-11-13 19:27 -0800
    Re: Generate unique ID for URL Johannes Bauer <dfnsonfsduifb@gmx.de> - 2012-11-14 12:29 +0100
      Re: Generate unique ID for URL Dave Angel <d@davea.name> - 2012-11-14 07:33 -0500
        Re: Generate unique ID for URL Johannes Bauer <dfnsonfsduifb@gmx.de> - 2012-11-14 14:00 +0100

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