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@pec1985
Last active January 30, 2018 14:58
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Array indexOf vs for loop
function Pe(){};
var len = 1000000;
var half = len / 2;
var array = [];
var last = new Pe();
while(len--) {
array.push(new Pe());
}
array.push(last);
(function(){
var d = new Date().getTime();
var i = array.indexOf(last);
console.log('(indexOf) Index: ' + i + '\tmilliseconds: ' + (new Date().getTime() - d));
})();
(function(){
var d = new Date().getTime();
var index = -1;
for(var i = 0, len = array.length; i < len; i++) {
if(array[i] === last) {
index = i;
break;
}
}
console.log('(for loop) Index: ' + index + '\tmilliseconds: ' + (new Date().getTime() - d));
})();
@pec1985
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pec1985 commented Oct 13, 2014

For loop is by far, faster

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