jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.
jsperf.com URLs are mirrored at the same path, e.g:
https://jsperf.com/negative-modulo/2
Can be accessed at:
https://jsperf.app/negative-modulo/2
<div id="main" style="display: none" data-bind="template: 'repeat'"></div>
<script id="repeat" type="text/html">
<table>
<tr data-bind="repeat: { foreach: rows, item: '$row' }">
<td data-bind="repeat: { foreach: $row().cells, item: '$cell', bind: 'text: \'Cell \' + $cell().id()'}"></td>
</tr>
</table>
</script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js">
</script>
<script type='text/javascript' src="https://raw.github.com/mbest/knockout-repeat/master/knockout-repeat.js"></script>
<script>
function Cell(id) {
this.id = ko.observable(id);
}
function Row(id) {
this.id = ko.observable(id);
this.cells = ko.observableArray();
}
var viewModel = {
rows: ko.observableArray()
};
for (var i = 0; i < 10; i++) {
var row = new Row(i);
for (var j = 0; j < 20; j++) {
row.cells.push(new Cell(i + " - " + j));
}
viewModel.rows.push(row);
}
ko.utils.buildEvalFunction = function (expression, scopeLevels) {
// Build the source for a function that evaluates "expression"
// For each scope variable, add an extra level of "with" nesting
// Example result: with(sc[1]) { with(sc[0]) { return (expression) } }
var functionBody = "return (" + expression + ")";
for (var i = 0; i < scopeLevels; i++) {
functionBody = "with(sc[" + i + "]) { " + functionBody + " } ";
}
return new Function("sc", functionBody);
};
ko.bindingProvider['instance'].bindingCache = {};
var withoutcache = ko.bindingProvider['instance'].parseBindingsString;
var withcache = function(bindingsString, bindingContext) {
try {
var viewModel = bindingContext['$data'];
var scopes = (typeof viewModel == 'object' && viewModel != null) ? [viewModel, bindingContext] : [bindingContext];
var cacheKey = scopes.length + '_' + bindingsString;
var bindingFunction;
if (cacheKey in this.bindingCache) {
bindingFunction = this.bindingCache[cacheKey];
} else {
var rewrittenBindings = " { " + ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson(bindingsString) + " } ";
bindingFunction = this.bindingCache[cacheKey] = ko.utils.buildEvalFunction(rewrittenBindings, scopes.length);
}
return bindingFunction(scopes);
} catch (ex) {
throw new Error("Unable to parse bindings.\nMessage: " + ex + ";\nBindings value: " + bindingsString);
}
};
</script>
ko.utils.emptyDomNode($("#main")[0]);
ko.bindingProvider['instance'].bindingCache = {};
Ready to run.
Test | Ops/sec | |
---|---|---|
with cache |
| ready |
without cache |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.