<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<script type="text/javascript">
// <![CDATA[
function testFunction (n, f) {
var start = new Date();
for (var i = 0; i < n; i++) { f(); }
return new Date().getTime() - start.getTime();
}
function compareAll (n, funcs) {
var fns = new Array();
var times = {};
document.write("<ul>");
for (var fn in funcs) {
var f = funcs[fn];
if (f) {
var t = testFunction(n, f);
fns.push(fn);
times[fn] = t;
document.write("<li>" + fn + " x " + n + ": " + t + " ms</li>");
}
}
document.write("</ul>");
fns.sort(function (a, b) { return times[b] - times[a]; });
document.write("<table border=1>");
document.write("<tr>");
document.write("<th> </th>");
document.write("<th>Rate</th>");
for (var i in fns) {
var fn = fns[i];
document.write("<th>" + fn + "</th>");
}
document.write("</tr>");
for (var i in fns) {
var fn = fns[i];
var ft = times[fn];
document.write("<tr>");
document.write("<th>" + fn + "</th>");
document.write("<td>" + Math.round(n / (times[fn] / 1000)) + "/s</td>");
for (var j in fns) {
var fn2 = fns[j];
var cmp;
if (fn == fn2) {
cmp = "--";
} else {
var ft2 = times[fn2];
var diff = (ft2 - ft) / ft2;
cmp = (diff > 0 ? "+" : "");
cmp += Math.round(1000 * diff) / 10;
cmp += "%";
}
document.write("<td>" + cmp + "</td>");
}
document.write("</tr>");
}
document.write("</table>");
}
//]]>
</script>
</head>
<body>
<div id="test" class="a b c d e f g h i"/>
<script type="text/javascript">
// <![CDATA[
var hasClass1 = (function () {
var reCache1 = {};
function getRegex(className) {
if (reCache1[className]) return reCache1[className];
var re = new RegExp("(?:\\s|^)" + className + "(?:\\s|$)");
reCache1[className] = re;
return re;
}
return function (element, className) {
return element.className.match(getRegex(className));
};
})();
function hasClass2 (element, className) {
return element.className.match(
new RegExp("(?:\\s|^)" + className + "(?:\\s|$)"));
}
function hasClass3 (element, className) {
var Classes = element.className.split( " " );
for ( var i = 0; i < Classes.length; i++ ) {
if ( Classes[i] == className ) {
return ( true );
}
}
return ( false );
}
var hasClass4 = (function () {
var reCache2 = {};
return function (element, className) {
var re = reCache2[className];
if (!re) {
re = new RegExp("(?:\\s|^)" + className + "(?:\\s|$)");
reCache2[className] = re;
}
return element.className.match(re);
};
})();
function hasClass5 (element, className) {
return element.className.match(
new RegExp("(\\s|^)" + className + "(\\s|$)"));
}
var hasClass9 = (function () {
var reCache6 = {};
return function (element, className) {
return (reCache6[className] ? reCache6[className] : (reCache6[className] = new RegExp("(?:\\s|^)" + className + "(?:\\s|$)"))).test(element.className);
};
})();
var test = document.getElementById("test");
compareAll(10000, {
"re+cache": function () { hasClass1(test, String.fromCharCode(97 + Math.round(Math.random() * 25))) },
"re+nocache": function () { hasClass2(test, String.fromCharCode(97 + Math.round(Math.random() * 25))) },
"split": function () { hasClass3(test, String.fromCharCode(97 + Math.round(Math.random() * 25))) },
"re+nocache+capture": function () { hasClass5(test, String.fromCharCode(97 + Math.round(Math.random() * 25))) },
//"re+literal": function () { test.className.match(/(?:^|\s)d(?:$|\s)/) },
"re+cache+onefunc4": function () { hasClass4(test, String.fromCharCode(97 + Math.round(Math.random() * 25))) },
"re+cache+onefunc9": function () { hasClass9(test, String.fromCharCode(97 + Math.round(Math.random() * 25))) }
});
//]]>
</script>
</body>
</html>
