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
To compare the native JSON.parse function against other evaluation techniques like "eval" and "new Function"
<script src="//ajax.googleapis.com/ajax/libs/ext-core/3/ext-core.js"></script>var Crockford;
if (!Crockford) {
Crockford = {};
}
(function() {
'use strict';
function f(n) {
return n < 10 ? '0' + n : n;
}
if (typeof Date.prototype.toJSON !== 'function') {
Date.prototype.toJSON = function(key) {
return isFinite(this.valueOf()) ? this.getUTCFullYear() + '-' + f(this.getUTCMonth() + 1) + '-' + f(this.getUTCDate()) + 'T' + f(this.getUTCHours()) + ':' + f(this.getUTCMinutes()) + ':' + f(this.getUTCSeconds()) + 'Z' : null;
};
String.prototype.toJSON =
Number.prototype.toJSON =
Boolean.prototype.toJSON = function(key) {
return this.valueOf();
};
}
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
gap, indent, meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"': '\\"',
'\\': '\\\\'
},
rep;
function quote(string) {
escapable.lastIndex = 0;
return escapable.test(string) ? '"' + string.replace(escapable, function(a) {
var c = meta[a];
return typeof c === 'string' ? c : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
}) + '"' : '"' + string + '"';
}
function str(key, holder) {
var i,
k,
v,
length, mind = gap,
partial, value = holder[key];
if (value && typeof value === 'object' && typeof value.toJSON === 'function') {
value = value.toJSON(key);
}
if (typeof rep === 'function') {
value = rep.call(holder, key, value);
}
switch (typeof value) {
case 'string':
return quote(value);
case 'number':
return isFinite(value) ? String(value) : 'null';
case 'boolean':
case 'null':
return String(value);
case 'object':
if (!value) {
return 'null';
}
gap += indent;
partial = [];
if (Object.prototype.toString.apply(value) === '[object Array]') {
length = value.length;
for (i = 0; i < length; i += 1) {
partial[i] = str(i, value) || 'null';
}
v = partial.length === 0 ? '[]' : gap ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' : '[' + partial.join(',') + ']';
gap = mind;
return v;
}
if (rep && typeof rep === 'object') {
length = rep.length;
for (i = 0; i < length; i += 1) {
if (typeof rep[i] === 'string') {
k = rep[i];
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
} else {
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
}
v = partial.length === 0 ? '{}' : gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' : '{' + partial.join(',') + '}';
gap = mind;
return v;
}
}
if (typeof Crockford.stringify !== 'function') {
Crockford.stringify = function(value, replacer, space) {
var i;
gap = '';
indent = '';
if (typeof space === 'number') {
for (i = 0; i < space; i += 1) {
indent += ' ';
}
} else if (typeof space === 'string') {
indent = space;
}
rep = replacer;
if (replacer && typeof replacer !== 'function' && (typeof replacer !== 'object' || typeof replacer.length !== 'number')) {
throw new Error('Crockford.stringify');
}
return str('', {
'': value
});
};
}
if (typeof Crockford.parse !== 'function') {
Crockford.parse = function(text, reviver) {
var j;
function walk(holder, key) {
var k, v, value = holder[key];
if (value && typeof value === 'object') {
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
}
}
}
return reviver.call(holder, key, value);
}
text = String(text);
cx.lastIndex = 0;
if (cx.test(text)) {
text = text.replace(cx, function(a) {
return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
});
}
if (/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
j = eval('(' + text + ')');
return typeof reviver === 'function' ? walk({
'': j
}, '') : j;
}
throw new SyntaxError('Crockford.parse');
};
}
}());
var json = '{"web-app": { "servlet": [ { "servlet-name": "cofaxCDS", "servlet-class": "org.cofax.cds.CDSServlet", "init-param": { "configGlossary:installationAt": "Philadelphia, PA", "configGlossary:adminEmail": "ksm@pobox.com", "configGlossary:poweredBy": "Cofax", "configGlossary:poweredByIcon": "/images/cofax.gif", "configGlossary:staticPath": "/content/static", "templateProcessorClass": "org.cofax.WysiwygTemplate", "templateLoaderClass": "org.cofax.FilesTemplateLoader", "templatePath": "templates", "templateOverridePath": "", "defaultListTemplate": "listTemplate.htm", "defaultFileTemplate": "articleTemplate.htm", "useJSP": false, "jspListTemplate": "listTemplate.jsp", "jspFileTemplate": "articleTemplate.jsp", "cachePackageTagsTrack": 200, "cachePackageTagsStore": 200, "cachePackageTagsRefresh": 60, "cacheTemplatesTrack": 100, "cacheTemplatesStore": 50, "cacheTemplatesRefresh": 15, "cachePagesTrack": 200, "cachePagesStore": 100, "cachePagesRefresh": 10, "cachePagesDirtyRead": 10, "searchEngineListTemplate": "forSearchEnginesList.htm", "searchEngineFileTemplate": "forSearchEngines.htm", "searchEngineRobotsDb": "WEB-INF/robots.db", "useDataStore": true, "dataStoreClass": "org.cofax.SqlDataStore", "redirectionClass": "org.cofax.SqlRedirection", "dataStoreName": "cofax", "dataStoreDriver": "com.microsoft.jdbc.sqlserver.SQLServerDriver", "dataStoreUrl": "jdbc:microsoft:sqlserver://LOCALHOST:1433;DatabaseName=goon", "dataStoreUser": "sa", "dataStorePassword": "dataStoreTestQuery", "dataStoreTestQuery": "SET NOCOUNT ON;select test='test';", "dataStoreLogFile": "/usr/local/tomcat/logs/datastore.log", "dataStoreInitConns": 10, "dataStoreMaxConns": 100, "dataStoreConnUsageLimit": 100, "dataStoreLogLevel": "debug", "maxUrlLength": 500}}, { "servlet-name": "cofaxEmail", "servlet-class": "org.cofax.cds.EmailServlet", "init-param": { "mailHost": "mail1", "mailHostOverride": "mail2"}}, { "servlet-name": "cofaxAdmin", "servlet-class": "org.cofax.cds.AdminServlet"}, { "servlet-name": "fileServlet", "servlet-class": "org.cofax.cds.FileServlet"}, { "servlet-name": "cofaxTools", "servlet-class": "org.cofax.cms.CofaxToolsServlet", "init-param": { "templatePath": "toolstemplates/", "log": 1, "logLocation": "/usr/local/tomcat/logs/CofaxTools.log", "logMaxSize": "", "dataLog": 1, "dataLogLocation": "/usr/local/tomcat/logs/dataLog.log", "dataLogMaxSize": "", "removePageCache": "/content/admin/remove?cache=pages&id=", "removeTemplateCache": "/content/admin/remove?cache=templates&id=", "fileTransferFolder": "/usr/local/tomcat/webapps/content/fileTransferFolder", "lookInContext": 1, "adminGroupID": 4, "betaServer": true}}], "servlet-mapping": { "cofaxCDS": "/", "cofaxEmail": "/cofaxutil/aemail/*", "cofaxAdmin": "/admin/*", "fileServlet": "/static/*", "cofaxTools": "/tools/*"}, "taglib": { "taglib-uri": "cofax.tld", "taglib-location": "/WEB-INF/tlds/cofax.tld"}}}';Ready to run.
| Test | Ops/sec | |
|---|---|---|
| JSON.parse | | ready |
| eval | | ready |
| Function | | ready |
| Crockford | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.