Re: shuffle or mt_rand

From: Date: Fri, 29 Jun 2007 12:20:29 +0000
Subject: Re: shuffle or mt_rand
References: 1 2  Groups: php.general 
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Just did a quick benchmark for 10.000 hands (making a full deck on your code, 23.5 players): Microtime difference: Ryan's code:15.725826978683 Tijnema's code:0.40006709098816 Unique decks out of 10000: Ryan's code:10000 Tijnema's code:10000 When making a full deck my code is 40 times faster, and a lot less memory intensive. And as you can see, for both all 10000 decks are unique, so both are random :) But, also when generating cards for only 4 players, my code is twice as fast as yours, and both generate still 10000 random decks: Microtime difference: Ryan's code:0.82403707504272 Tijnema's code:0.40426802635193 Unique decks out of 10000: Ryan's code:10000 Tijnema's code:10000 Tijnema
Just a pointer: Just because you get 10000 different decks doesn't mean that it is random. Since there are 52! (around 8*10^67) different decks and you choose 10000 of theese you would be very lucky to get 2 that are the same. -- /Thunis "I refuse to answer that question on the grounds that I don't know the answer." --The Hitchikers Guide to the Galaxy

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