inarray performance comparsion

1.

revideo = /mp3|mp4|rm|asf|wma|avi|mpeg|wmv|mpg|3gp|flv|aac|wav|ram|gsm|divx|xvid|amr|rmvb|mov/;
function search_revideo = function (s) {
   revideo.test(s);
}

2.

svideo = 'mp3|mp4|rm|asf|wma|avi|mpeg|wmv|mpg|3gp|flv|aac|wav|ram|gsm|divx|xvid|amr|rmvb|mov|';
function search_svideo = function(s) {
   return svideo.indexOf(s + '|') === -1 ? false:true;
}

3.

avideo = ['mp3', 'mp4', 'rm', 'asf', 'wma', 'avi', 'mpeg', 'wmv', '3gp', 'flv', 'aac', 'wav', 'ram', 'gsm', 'divx', 'xvid', 'amr' ,'rmvb', 'mov' ];
function search_avideo = function(s) {
   for (var i=0, len=avideo.length; i<len; i++) {
       if (avideo[i] === t) {
           return true;
       }
   }
   return false;
}

4.

ovideo = { 'mp3' : null, 'mp4': null, 'rm': null, 'asf' : null, 'wma':null, 'avi' : null, 'mpeg': null, 'wmv' : null, '3gp':null, 'flv': null, 'aac' :
null, 'wav': null, 'ram':null, 'gsm':null, 'divx':null, 'xvid':null, 'amr':null, 'rmvb':null, 'mov':null }
function search_ovideo = function(s) {
   return ovideo[s] === null;
}

跑十萬次
1. search_ovideo 41
2. search_avidoe 125
3. search_svideo 292
4. search_revideo 495