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
<script src="//ajax.cdnjs.com/ajax/libs/json2/20110223/json2.js"></script>
<script>
function clone_json(data) {
return JSON.parse(JSON.stringify(data));
}
function clone_recursive(data) {
var A = Array;
if (typeof data === "object" && data !== null) {
var out = data instanceof A ? [] : {};
for (var key in data) {
if (data.hasOwnProperty(key)) {
out[key] = clone_recursive(data[key]);
}
}
return out;
}
return data;
}
function clone_loop(dataIn) {
var dataOut = {};
var queue = [],
spec = [dataOut, 'data', dataIn];
var A = Array;
do {
var copyTo = spec[0],
toKey = spec[1],
theObj = spec[2];
if (theObj !== null && typeof theObj === "object") {
var to = copyTo[toKey] = theObj instanceof A ? [] : {};
for (var key in theObj) {
if (theObj.hasOwnProperty(key)) {
queue.push([to, key, theObj[key]]);
}
}
}
else {
copyTo[toKey] = theObj;
}
} while ((spec = queue.shift()));
return dataOut.data;
}
function clone_recursive_create(data) {
var A = Array;
if (typeof data === "object" && data !== null) {
if (data instanceof A) {
return map(data, clone_recursive_create);
}
else {
var out = Object.create(data);
var keys = Object.keys(data);
for (var i = 0, len = keys.length; i < len; i++) {
var key = keys[i],
thing = out[key];
if (thing !== null && typeof thing === "object") {
out[key] = clone_recursive_create(thing);
}
}
}
}
return data;
}
var cloner = {
_clone: function _clone(obj) {
if (obj instanceof Array) {
var out = [];
for (var i = 0, len = obj.length; i < len; i++) {
var value = obj[i];
out[i] = (value !== null && typeof value === "object") ? _clone(value) : value;
}
}
else {
var out = {};
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
var value = obj[key];
out[key] = (value !== null && typeof value === "object") ? _clone(value) : value;
}
}
}
return out;
},
clone: function(it) {
return this._clone({
it: it
}).it;
}
};
var cloner2 = {
_clone: function _clone(obj) {
if (obj instanceof Array) {
var out = [];
for (var i = 0, len = obj.length; i < len; i++) {
var value = obj[i];
out[i] = (value instanceof Object) ? _clone(value) : value;
}
}
else {
var out = {};
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
var value = obj[key];
out[key] = (value instanceof Object) ? _clone(value) : value;
}
}
}
return out;
},
clone: function(it) {
return this._clone({
it: it
}).it;
}
};
var cloner3 = {
_clone: function _clone(obj) {
var O = Object;
if (obj instanceof Array) {
var out = [];
for (var i = 0, len = obj.length; i < len; i++) {
var value = obj[i];
out[i] = (value instanceof O) ? _clone(value) : value;
}
}
else {
var out = {};
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
var value = obj[key];
out[key] = (value instanceof O) ? _clone(value) : value;
}
}
}
return out;
},
clone: function(it) {
return this._clone({
it: it
}).it;
}
};
var getKeys = Object.keys ||
function(obj) {
var keys = [];
for (var key in obj) {
if (obj.hasOwnProperty(key)) {
keys.push(key);
}
}
return keys;
};
var map = ([].map ?
function(a, func) {
return a.map(func);
} : function(a, func) {
var out = [];
for (var i = 0, len = a.len; i < len; i++) {
out[i] = func(a[i]);
}
return out;
});
var data = {
"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"
}
}
};
var data2 = [{
"id": "0001",
"type": "donut",
"name": "Cake",
"ppu": 0.55,
"batters": {
"batter": [{
"id": "1001",
"type": "Regular"
},
{
"id": "1002",
"type": "Chocolate"
},
{
"id": "1003",
"type": "Blueberry"
},
{
"id": "1004",
"type": "Devil's Food"
}]
},
"topping": [{
"id": "5001",
"type": "None"
},
{
"id": "5002",
"type": "Glazed"
},
{
"id": "5005",
"type": "Sugar"
},
{
"id": "5007",
"type": "Powdered Sugar"
},
{
"id": "5006",
"type": "Chocolate with Sprinkles"
},
{
"id": "5003",
"type": "Chocolate"
},
{
"id": "5004",
"type": "Maple"
}]
},
{
"id": "0002",
"type": "donut",
"name": "Raised",
"ppu": 0.55,
"batters": {
"batter": [{
"id": "1001",
"type": "Regular"
}]
},
"topping": [{
"id": "5001",
"type": "None"
},
{
"id": "5002",
"type": "Glazed"
},
{
"id": "5005",
"type": "Sugar"
},
{
"id": "5003",
"type": "Chocolate"
},
{
"id": "5004",
"type": "Maple"
}]
},
{
"id": "0003",
"type": "donut",
"name": "Old Fashioned",
"ppu": 0.55,
"batters": {
"batter": [{
"id": "1001",
"type": "Regular"
},
{
"id": "1002",
"type": "Chocolate"
}]
},
"topping": [{
"id": "5001",
"type": "None"
},
{
"id": "5002",
"type": "Glazed"
},
{
"id": "5003",
"type": "Chocolate"
},
{
"id": "5004",
"type": "Maple"
}]
}];
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
clone w/JSON |
| ready |
clone traditional / recursive |
| ready |
clone traditional / looped |
| ready |
clone w/Object.create() / recursice |
| ready |
clone / early iteration |
| ready |
clone / early iteration w/instanceof |
| ready |
clone / early iteration w/instanceof + local reference to Object |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.