Re: python implementation of a new integer encoding algorithm.

References	(3 earlier) <mailman.18823.1424278025.18130.python-list@python.org> <2a717ffb-d61d-4407-9082-1c17cd7ee573@googlegroups.com> <mailman.18839.1424298000.18130.python-list@python.org> <993f64c3-fc85-48a7-9d02-a4f12ecb33c6@googlegroups.com> <CALwzidnbtan8vFMdSfTTU00pD+VSS7XTJR4oLBLLqqgjxAcP4A@mail.gmail.com>
From	Ian Kelly <ian.g.kelly@gmail.com>
Date	2015-02-19 11:16 -0700
Subject	Re: python implementation of a new integer encoding algorithm.
Newsgroups	comp.lang.python
Message-ID	<mailman.18893.1424369820.18130.python-list@python.org> (permalink)

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On Thu, Feb 19, 2015 at 11:04 AM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
> There's also an optimization that can be added here if we wish to
> inject a bit of cleverness. Notice that all values with more than one
> group start with 11, never 10. We can borrow a trick from IEEE
> floating point and make the leading 1 bit of the mantissa implicit for
> all values greater than 3 (we can't do it for 2 and 3 because then we
> couldn't distinguish them from 0 and 1). Applying this optimization
> removes one full group from the representation of all values greater
> than 3, which appears to make the stop-bit representation as short as
> or shorter than the "difficult" one for all the values that have been
> enumerated above.

I made a mistake. This trick only works if the second group is 10, so
it only applies to half the numbers. That makes 12 and 13 a group
longer than the difficult representation, but on the other hand 18-23
are still a group shorter.

Thread

python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-17 03:22 -0800
  Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-18 00:16 +1100
    Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 00:55 -0800
      Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-18 20:36 +1100
        Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 11:29 -0800
      Re: python implementation of a new integer encoding algorithm. Laura Creighton <lac@openend.se> - 2015-02-18 11:32 +0100
        Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 11:48 -0800
      People hated it for the same reasons I found them cool (was: python implementation of a new integer encoding algorithm.) Ben Finney <ben+python@benfinney.id.au> - 2015-02-18 21:57 +1100
  Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-17 09:12 -0500
    Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 00:59 -0800
      Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-18 11:46 -0500
        Re: python implementation of a new integer encoding algorithm. Grant Edwards <invalid@invalid.invalid> - 2015-02-18 17:30 +0000
          Re: python implementation of a new integer encoding algorithm. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-18 18:12 +0000
        Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 11:55 -0800
          Re: python implementation of a new integer encoding algorithm. Marko Rauhamaa <marko@pacujo.net> - 2015-02-18 23:54 +0200
            Re: python implementation of a new integer encoding algorithm. Marko Rauhamaa <marko@pacujo.net> - 2015-02-19 00:08 +0200
            Re: python implementation of a new integer encoding algorithm. Grant Edwards <invalid@invalid.invalid> - 2015-02-18 22:58 +0000
          Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-18 17:19 -0500
            Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-19 07:45 -0800
              Re: python implementation of a new integer encoding algorithm. Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-19 11:04 -0700
              Re: python implementation of a new integer encoding algorithm. Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-19 11:16 -0700
              Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-19 13:24 -0500
              Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-20 05:34 +1100
              Re: python implementation of a new integer encoding algorithm. Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-19 11:32 -0700
              Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-19 13:41 -0500
              Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-19 13:46 -0500
              Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-20 05:49 +1100
      Re: python implementation of a new integer encoding algorithm. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-18 17:00 +0000
  Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-18 01:34 +1100
    Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 01:04 -0800
      Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-18 08:54 -0500
        Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 11:52 -0800
      Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-19 01:16 +1100
  Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-17 09:50 -0500
  Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-18 01:58 +1100
  Re: python implementation of a new integer encoding algorithm. Dave Angel <davea@davea.name> - 2015-02-17 10:18 -0500
  Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-18 02:25 +1100
  Re: python implementation of a new integer encoding algorithm. Paul Rubin <no.email@nospam.invalid> - 2015-02-17 08:43 -0800
    Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-18 01:06 -0800
  Re: python implementation of a new integer encoding algorithm. Mario Figueiredo <marfig@gmail.com> - 2015-02-19 08:44 +0100
    Re: python implementation of a new integer encoding algorithm. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-19 08:06 +0000
      Re: python implementation of a new integer encoding algorithm. Marko Rauhamaa <marko@pacujo.net> - 2015-02-19 10:36 +0200
        Re: python implementation of a new integer encoding algorithm. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-19 09:33 +0000
        Re: python implementation of a new integer encoding algorithm. Terry Reedy <tjreedy@udel.edu> - 2015-02-19 14:50 -0500
          Re: python implementation of a new integer encoding algorithm. Marko Rauhamaa <marko@pacujo.net> - 2015-02-19 21:55 +0200
    Re: python implementation of a new integer encoding algorithm. Chris Angelico <rosuav@gmail.com> - 2015-02-19 19:36 +1100
    Re: python implementation of a new integer encoding algorithm. Mario Figueiredo <marfig@gmail.com> - 2015-02-19 10:42 +0100
    Re: python implementation of a new integer encoding algorithm. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-19 10:28 +0000
    Re: python implementation of a new integer encoding algorithm. Mario Figueiredo <marfig@gmail.com> - 2015-02-19 14:27 +0100
  Re: python implementation of a new integer encoding algorithm. Jonas Wielicki <jonas@wielicki.name> - 2015-02-19 09:38 +0100
    Re: python implementation of a new integer encoding algorithm. janhein.vanderburg@gmail.com - 2015-02-19 07:58 -0800
  Re: python implementation of a new integer encoding algorithm. Denis McMahon <denismfmcmahon@gmail.com> - 2015-02-20 02:46 +0000
    Re: python implementation of a new integer encoding algorithm. wxjmfauth@gmail.com - 2015-02-20 00:58 -0800

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