UUID golf (v10)

Revision 10 of this benchmark created on

Setup

build = function(a,b){for(b=a='';a++<24;b+=~a%5|a*3&4?(a^15?8^Math.random()*(a^20?16:4):4).toString(16):'-');return b+((new Date().valueOf()*(~~(Math.random()+1)*16)).toString(16))}
    
    build2 = function b(a){return a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,b)}
    
    replace = function b(a){return a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,b)}
    
    another = function(){return"00000000-0000-4000-8000-000000000000".replace(/0/g,function(){return(0|Math.random()*16).toString(16)})}
    
    sub = function () {
    var s=function(){return (((1+Math.random())*0x10000)|0).toString(16).substring(1);},r=[8,9,"a","b"]
    return (s()+s()+"-"+s()+"-4"+s().substr(0,3)+"-"+r[Math.floor(Math.random()*4)]+s().substr(0,3)+"-"+s()+s()+s())
    }

Test runner

Ready to run.

Testing in
TestOps/sec
build()
build()
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replace()
replace()
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another()
another()
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sub()
sub()
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Revisions

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