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| <body>
Saisir le nombre d elements à créer<input type="text" id="nbelems" value=""/>
<input type="button" onclick="alert(_createElement(parseInt(nbelemsInput.value, 10)))" value="par create element option"/>
<input type="button" onclick="alert(_newOption(parseInt(nbelemsInput.value, 10)))" value="par new Option"/>
<input type="button" onclick="alert(_cloneNode(parseInt(nbelemsInput.value, 10)))" value="par cloneNode"/><br/>
ou démarrer un test de comparaison (creant 1, 10, 100, 1000 et 10000 elements pour chacune des méthodes...
<input type="button" onclick="compareAll()" value="comparaison"/>
<div id="target">
</div>
<script type="text/javascript">
var target = document.getElementById("target");
var nbelemsInput = document.getElementById("nbelems");
var clearTarget = function() {
for(var i=0;i<target.childNodes.length; i++) {
target.removeChild(target.childNodes[i])
}
};
var _createElement = function(nb) {
clearTarget();
var select = document.createElement("select");
target.appendChild(select);
var dt = new Date().getTime();
var j=0;
while(j<nb) {
var opt = document.createElement("option");
opt.text = j;
opt.value = j;
select.options.add(opt);
j++;
}
return (new Date().getTime() - dt);
}
var _newOption = function(nb) {
clearTarget();
var select = document.createElement("select");
target.appendChild(select);
var dt = new Date().getTime();
var j=0;
while(j < nb) {
select.options[j] = new Option(j, j);
j++;
}
return (new Date().getTime() - dt);
}
var _cloneNode = function(nb) {
clearTarget();
var select = document.createElement("select");
target.appendChild(select);
var dt = new Date().getTime();
var j=0;
var modelNode = document.createElement("option");
while(j < nb) {
var opt = modelNode.cloneNode(false);
opt.text = j;
opt.value = j;
select.options.add(opt);
j++;
}
return (new Date().getTime() - dt);
}
var compareAll = function() {
var methods = ["_createElement","_newOption","_cloneNode"]
var nbLoops = 1;
var maxPow = 5;
var arr = new Array();
var runners = [];
var str = "<table border='1'><tr><th>itération</th><th>nb options</th>";
for(var i=0;i<methods.length;i++) {
arr.push([]);
runners.push(window[methods[i]]);
str += "<th>" + methods[i] + "</th>";
}
str += "</tr>";
for(var i=0;i<nbLoops;i++) {
for(var j=0;j<maxPow;j++) {
for(var mIndex = 0;mIndex<methods.length; mIndex++) {
arr[mIndex].push(runners[mIndex](Math.pow(10,j)));
}
}
}
var counter = 0;
var time = [];
var nbElements = 0;
for(var mIndex = 0;mIndex<methods.length; mIndex++) {
time[mIndex] = 0;
}
for(var i=0;i<nbLoops;i++) {
for(var j=0;j<maxPow;j++) {
str += "<tr>";
str += "<td>" + i + "</td>";
str += "<td>" + Math.pow(10,j) + "</td>";
for(var mIndex = 0;mIndex<methods.length; mIndex++) {
str += "<td>" + arr[mIndex][counter] + "</td>";
time[mIndex] += (arr[mIndex][counter]);
}
nbElements += (Math.pow(10,j))
str += "</tr>";
counter++;
}
}
str+= "<tr><td colspan='2'>moyenne/elem</td>";
for(var mIndex = 0;mIndex<methods.length; mIndex++) {
str += "<td>" + (time[mIndex] / nbElements) + "</td>";
}
str += "</tr></table>";
target.innerHTML = str;
}
</script>
</body> |
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