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| Date | Sun, 29 Mar 2015 15:10:46 +1100 |
| Subject | Re: Sudoku solver |
| From | Chris Angelico <rosuav@gmail.com> |
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On Sun, Mar 29, 2015 at 2:06 PM, Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote: > On Sun, 29 Mar 2015 10:50 am, BartC wrote: > >> (X is my own interpreted language, which is where my interest in this >> is. This had been generally faster than Python until PyPy came along. It >> does however use a pure byte-code interpreter, so the result is not too >> bad. >> >> But using X *and* my own brute-force algorithm, the same puzzle took 2 >> seconds to solve - faster than C! > > But, when you tell me that your very own personal interpreted language, > which I assume nobody else has worked on, is 40% faster than optimized C, > my first reaction is to expect that you've probably made a mistake > somewhere. I would have the same reaction if somebody casually dropped into > a conversation that they happened to beat Usain Bolt's 100m personal best > of 9.58 seconds by almost four seconds. While carrying a 20kg backpack. I think you're misreading the stats. The first table compares languages, all using the same algorithm, and in that, C beat X ten to one, unoptimized. The second figure, when X took only 2 seconds, was demonstrating the massive improvement that the algorithmic change (from "the OP's algorithm" to "[BartC's] own brute-force algorithm") achieved. For comparison, that's like casually dropping into conversation that you happened to drive a car faster than Usain Bolt's personal best. :) ChrisA
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Sudoku solver Marko Rauhamaa <marko@pacujo.net> - 2015-03-25 13:39 +0200
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Re: Sudoku solver Marko Rauhamaa <marko@pacujo.net> - 2015-03-25 22:31 +0200
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Re: Sudoku solver Sayth <flebber.crue@gmail.com> - 2015-03-27 20:39 -0700
Re: Sudoku solver BartC <bc@freeuk.com> - 2015-03-28 23:50 +0000
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Re: Sudoku solver Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-29 22:19 +0100
Re: Sudoku solver BartC <bc@freeuk.com> - 2015-03-29 22:59 +0100
Re: Sudoku solver Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-29 14:06 +1100
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Re: Sudoku solver Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-29 21:35 +1100
Re: Sudoku solver Chris Angelico <rosuav@gmail.com> - 2015-03-29 21:54 +1100
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Re: Sudoku solver BartC <bc@freeuk.com> - 2015-03-29 16:23 +0100
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Re: Sudoku solver BartC <bc@freeuk.com> - 2015-03-29 23:17 +0100
Re: Sudoku solver Seymore4Head <Seymore4Head@Hotmail.invalid> - 2015-03-29 21:40 -0400
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Re: Sudoku solver "Frank Millman" <frank@chagford.com> - 2015-03-26 10:19 +0200
Re: Sudoku solver Marko Rauhamaa <marko@pacujo.net> - 2015-03-26 14:26 +0200
Re: Sudoku solver Chris Angelico <rosuav@gmail.com> - 2015-03-26 23:37 +1100
Re: Sudoku solver Ian Kelly <ian.g.kelly@gmail.com> - 2015-03-26 07:15 -0600
Re: Sudoku solver Marko Rauhamaa <marko@pacujo.net> - 2015-03-26 16:23 +0200
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Re: Sudoku solver Marko Rauhamaa <marko@pacujo.net> - 2015-03-26 17:48 +0200
Re: Sudoku solver Ian Kelly <ian.g.kelly@gmail.com> - 2015-03-26 10:20 -0600
Re: Sudoku solver Marko Rauhamaa <marko@pacujo.net> - 2015-03-26 18:47 +0200
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Re: Sudoku solver Chris Angelico <rosuav@gmail.com> - 2015-03-28 00:25 +1100
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Re: Sudoku solver Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-28 12:46 +1100
Re: Sudoku solver Larry Hudson <orgnut@yahoo.com> - 2015-03-27 16:48 -0700
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Re: Sudoku solver Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-03-28 14:13 +1300
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