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| <!doctype html>
<html lang="fr">
<head>
<meta charset="utf-8"/>
<meta name="Author" content="Daniel Hagnoul" />
<title>Page type</title>
<style>
body {
background-color:#dcdcdc;
color:#000000;
font-family:sans-serif;
font-size:medium;
font-style:normal;
font-weight:normal;
line-height:normal;
letter-spacing:normal;
}
h1,h2,h3,h4,h5 {
font-family:serif;
}
div,p,h1,h2,h3,h4,h5,h6,ul,ol,dl,form,table,img {
margin:0px;
padding:0px;
}
p {
padding:6px;
}
ul,ol,dl {
list-style:none;
padding-left:6px;
padding-top:6px;
}
li {
padding-bottom:6px;
}
div#conteneur {
width:95%;
margin:12px auto;
padding:6px;
background-color:#FFFFFF;
color:#000000;
border:1px solid #666666;
font-size:0.8em;
}
div#affiche {
margin:12px;
padding:6px;
border:1px solid #999999;
background-color:#FFFFFF;
color:#000000;
}
/* TEST */
pre {
font-family:sans-serif;
font-size:medium;
}
</style>
<script charset="CP-1252" src="../lib/jquery-1.4.2.min.js"></script>
<script>
$(function(){
function zeroLead20(num, long){
var nb = num.toString();
var n = long - nb.length;
var tab = [];
for(var i = 0; i < n; i++){
tab.push("0");
}
tab.push(nb);
return tab.join("");
}
function zeroLead21(num, long){
var nb = num.toString();
var n = long - nb.length;
var tab = [];
while(n--){ // (n-- > 0) dans essai 1
tab.push("0");
}
tab.push(nb);
return tab.join("");
}
console.log(zeroLead20(1234567890, 20000).length);
console.log(zeroLead21(1234567890, 20000).length);
});
</script>
</head>
<body>
<div id="conteneur">
<h1>Victoire par KO !</h1>
<pre>
Firebug, avec while(n-- > 0) pour zeroLead21 :
zeroLead20(1234567890, 20000) 1 27.99% 7.661ms 7.661ms 7.661ms 7.661ms 7.661ms
zeroLead21(1234567890, 20000) 1 27.84% 7.621ms 7.621ms 7.621ms 7.621ms 7.621ms
Firebug, avec while(n--) pour zeroLead21 :
zeroLead20 1 28.39% 7.603ms 7.603ms 7.603ms 7.603ms 7.603ms
zeroLead21 1 26.05% 6.975ms 6.975ms 6.975ms 6.975ms 6.975ms
</pre>
</div>
</body>
</html> |
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