代碼如下: var oldtime = new Date().getTime(); var str = []; for(i=0;i<100000;i++) { str.push('abcabcabcabcabcabcabcabcabcabcabcabc'); } var newtime = new Date().getTime(); var joinTime = (newtime - oldtime);
var oldtime = new Date().getTime(); var str=''; for(i=0;i<100000;i++) { str += 'abcabcabcabcabcabcabcabcabcabcabcabc'; } var newtime = new Date().getTime(); var concatTime = (newtime - oldtime);
