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PerfFun.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Perf Tests</title>
<script type="text/javascript" src="../../../dojo/dojo.js" djConfig="isDebug:true"></script>
<script type="text/javascript" src="lipsum.js"></script>
<script type="text/javascript">
dojo.addOnLoad(function(){
dojo.byId("run").disabled="";
dojo.connect(dojo.byId("run"),
"onclick",
function(evt) {
setTimeout(function() {
var words = parseInt(dojo.byId("numWords").value) || 10;
var iters = parseInt(dojo.byId("numIters").value) || 1000;
buildAndRunSet(words, iters);
}, 0);
});
});
function element(tag, textOrChild) {
var e = document.createElement(tag);
if(dojo.isArray(textOrChild)) dojo.forEach(textOrChild, function(c) { e.appendChild(c); });
if(dojo.isString(textOrChild)) e.appendChild(document.createTextNode(textOrChild));
else e.appendChild(textOrChild);
return e;
}
function log(t) {
dojo.byId("mess").innerHTML = t;
}
function reportRun(results){
var runs = results.runs
var report = element("dl",
element("dt",
"Run with " + results.words + " words, " +
results.iterations + " iterations and overhead of " +
results.overhead));
runs.sort(function(a,b) { return a.time - b.time; });
dojo.forEach(runs, function(r) {
report.appendChild(element("dd", r.time + " - " + r.name));
});
dojo.body().appendChild(report);
}
function runTest(test, iterations, expected) {
var i;
if(expected != test()) throw new Error("Test failed expecting " + expected + ", got " + test());
var start = new Date().getTime(), end;
for(i=0; i < iterations; i++){
test();
}
end = new Date().getTime();
return end-start;
}
function runSet(set, iterations){
var tests = set.tests.concat(); //copy tests
var resultSet = {};
resultSet.words = set.words.length;
resultSet.overhead = runTest(function(){}, iterations);
resultSet.iterations = iterations;
var runs = [];
function _run() {
var t = tests.pop();
try {
log("Running " + t.name);
if(t) runs.push({ name: t.name, time: runTest(t.test, iterations, set.expected)});
} catch(e) {
console.error("Error running " + t.name);
console.error(e);
}
if(tests.length > 0) {
setTimeout(_run, 0);
}
else {
log("Done!");
resultSet.runs = runs;
reportRun(resultSet);
}
}
setTimeout(_run, 0);
}
function buildTestSet(numWords) {
var words = [], i, wordsInLipsum = lipsum.length;
for(i = numWords; i > 0; i-=wordsInLipsum) {
if(i >= wordsInLipsum) { words = words.concat(lipsum); }
else { words = words.concat(lipsum.slice(-i)); }
}
if(words.length != numWords) throw new Error("wrong number of words, got " + words.length + ", expected " + numWords);
var expected = words.join("");
//console.log(words);
return {
tests: [
{
name: "dojoForEach",
test: function() {
var s = "";
dojo.forEach(words, function(w) { s+=w; });
return s;
}
},
{
name: "nativeForEach",
test: function() {
var s = "";
words.forEach(function(w) { s += w; });
return s;
}
},
{
name: "forLoop",
test: function() {
var s="",w=words; l=w.length;
for(var i = 0; i < l; i++) {
s += w[i];
}
return s;
}
},
{
name: "forLoopCallingInlineFunction",
test: function() {
var s="",w=words; l=w.length;
function fn(w) { s += w; };
for(var i = 0; i < l; i++) {
fn(w[i]);
}
return s;
}
},
{
name: "forLoopCallingExternalFunction",
test: function() {
g_s="",w=words; l=w.length;
for(var i = 0; i < l; i++) {
externalAppend(w[i]);
}
return g_s;
}
},
{
name: "forLoopWithInCheck",
test: function() {
var s="",w=words; l=w.length;
for(var i = 0; i < l; i++) {
if(i in w) s += w[i];
}
return s;
}
},
{
name: "emptyFor",
test: function() {
var w = words; l = w.length;
for(var i = 0; i < l; i++) empty(w[i]);
return expected;
}
},
{
name: "emptyForEach",
test: function() {
dojo.forEach(words, empty);
return expected;
}
} ,
{
name: "identFor",
test: function() {
var w = words; l = w.length;
for(var i = 0; i < l; i++) ident(w[i]);
return expected;
}
},
{
name: "identForEach",
test: function() {
dojo.forEach(words, ident);
return expected;
}
},
{
name: "addUsingFor",
test: function() {
var x=0;
for(var i=0;i<1000;i++){x=x+a[i];}
return expected; // fake
}
},
{
name: "addUsingForEach",
test: function() {
var x=0;
dojo.forEach(a, function(v,i){x=x+a[i];});
return expected; // fake
}
}
],
words: words,
expected: expected
};
}
function buildAndRunSet(words, times) {
runSet(buildTestSet(words), times);
}
function ident(w) { return w; }
function empty() { }
var g_s = "";
function externalAppend(w){ g_s += w; }
var a = new Array(1000);
for(var i=0; i<1000;i++){a[i]=i;}
</script>
<style type="text/css">
html {
font-family: Lucida Grande, Tahoma;
}
div { margin-bottom: 1em; }
#results {
border: 1px solid #999;
border-collapse: collapse;
}
#results caption {
font-size: medium;
font-weight: bold;
}
#results td, #results th {
text-align: right;
width: 10em;
font-size: small;
white-space: nowrap;
}
#wordsCol { background: yellow; }
td.max { color: red; font-weight: bold; }
td.min { color: green; font-weight: bold; }
</style>
</head>
<body>
<table>
<tr><td><label for="numWords">Words</label></td><td><input type="text" id="numWords" value="100"/></td></tr>
<tr><td><label for="numIters">Iterations</label></td><td><input type="text" id="numIters" value="1000"/></td></tr>
<tr><td></td><td><button id="run" disabled>Run Tests!</button></td></tr>
</table>
<div id="mess"></div>
</body>
</html>

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PerfFun.html (7 KB)

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