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
A comparison of different date libraries and their formatting functions.
<!-- Store native Date.toString as DateJS overrides it -->
<script>
var nativeDateToString = Date.prototype.toString;
</script>
<script src="https://raw.github.com/datejs/Datejs/master/build/date.js">
</script>
<script>
Date.prototype.dateJSFormat = Date.prototype.toString;
Date.prototype.toString = nativeDateToString;
</script>
<!-- xdate -->
<script src="https://raw.github.com/arshaw/xdate/master/src/xdate.js">
</script>
<!-- phpjs -->
<script src="https://raw.github.com/kvz/phpjs/master/functions/datetime/date.js">
</script>
<!-- Jacob Wright -->
<script>
Date.prototype.jwFormat = function(format) {
var returnStr = '';
var replace = Date.replaceChars;
for (var i = 0; i < format.length; i++) {
var curChar = format.charAt(i);
if (i - 1 >= 0 && format.charAt(i - 1) == "\\") {
returnStr += curChar;
} else if (replace[curChar]) {
returnStr += replace[curChar].call(this);
} else if (curChar != "\\") {
returnStr += curChar;
}
}
return returnStr;
};
Date.replaceChars = {
shortMonths: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
longMonths: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
shortDays: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
longDays: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
// Day
d: function() {
return (this.getDate() < 10 ? '0' : '') + this.getDate();
},
D: function() {
return Date.replaceChars.shortDays[this.getDay()];
},
j: function() {
return this.getDate();
},
l: function() {
return Date.replaceChars.longDays[this.getDay()];
},
N: function() {
return this.getDay() + 1;
},
S: function() {
return (this.getDate() % 10 == 1 && this.getDate() != 11 ? 'st' : (this.getDate() % 10 == 2 && this.getDate() != 12 ? 'nd' : (this.getDate() % 10 == 3 && this.getDate() != 13 ? 'rd' : 'th')));
},
w: function() {
return this.getDay();
},
z: function() {
var d = new Date(this.getFullYear(), 0, 1);
return Math.ceil((this - d) / 86400000);
},
// Fixed now
// Week
W: function() {
var d = new Date(this.getFullYear(), 0, 1);
return Math.ceil((((this - d) / 86400000) + d.getDay() + 1) / 7);
},
// Fixed now
// Month
F: function() {
return Date.replaceChars.longMonths[this.getMonth()];
},
m: function() {
return (this.getMonth() < 9 ? '0' : '') + (this.getMonth() + 1);
},
M: function() {
return Date.replaceChars.shortMonths[this.getMonth()];
},
n: function() {
return this.getMonth() + 1;
},
t: function() {
var d = new Date();
return new Date(d.getFullYear(), d.getMonth(), 0).getDate()
},
// Fixed now, gets #days of date
// Year
L: function() {
var year = this.getFullYear();
return (year % 400 == 0 || (year % 100 != 0 && year % 4 == 0));
},
// Fixed now
o: function() {
var d = new Date(this.valueOf());
d.setDate(d.getDate() - ((this.getDay() + 6) % 7) + 3);
return d.getFullYear();
},
//Fixed now
Y: function() {
return this.getFullYear();
},
y: function() {
return ('' + this.getFullYear()).substr(2);
},
// Time
a: function() {
return this.getHours() < 12 ? 'am' : 'pm';
},
A: function() {
return this.getHours() < 12 ? 'AM' : 'PM';
},
B: function() {
return Math.floor((((this.getUTCHours() + 1) % 24) + this.getUTCMinutes() / 60 + this.getUTCSeconds() / 3600) * 1000 / 24);
},
// Fixed now
g: function() {
return this.getHours() % 12 || 12;
},
G: function() {
return this.getHours();
},
h: function() {
return ((this.getHours() % 12 || 12) < 10 ? '0' : '') + (this.getHours() % 12 || 12);
},
H: function() {
return (this.getHours() < 10 ? '0' : '') + this.getHours();
},
i: function() {
return (this.getMinutes() < 10 ? '0' : '') + this.getMinutes();
},
s: function() {
return (this.getSeconds() < 10 ? '0' : '') + this.getSeconds();
},
u: function() {
var m = this.getMilliseconds();
return (m < 10 ? '00' : (m < 100 ? '0' : '')) + m;
},
// Timezone
e: function() {
return "Not Yet Supported";
},
I: function() {
return "Not Yet Supported";
},
O: function() {
return (-this.getTimezoneOffset() < 0 ? '-' : '+') + (Math.abs(this.getTimezoneOffset() / 60) < 10 ? '0' : '') + (Math.abs(this.getTimezoneOffset() / 60)) + '00';
},
P: function() {
return (-this.getTimezoneOffset() < 0 ? '-' : '+') + (Math.abs(this.getTimezoneOffset() / 60) < 10 ? '0' : '') + (Math.abs(this.getTimezoneOffset() / 60)) + ':00';
},
// Fixed now
T: function() {
var m = this.getMonth();
this.setMonth(0);
var result = this.toTimeString().replace(/^.+ \(?([^\)]+)\)?$/, '$1');
this.setMonth(m);
return result;
},
Z: function() {
return -this.getTimezoneOffset() * 60;
},
// Full Date/Time
c: function() {
return this.format("Y-m-d\\TH:i:sP");
},
// Fixed now
r: function() {
return this.toString();
},
U: function() {
return this.getTime() / 1000;
}
};
</script>
<!-- steven levithan -->
<script>
/*
* Date Format 1.2.3
* (c) 2007-2009 Steven Levithan <stevenlevithan.com>
* MIT license
*
* Includes enhancements by Scott Trenda <scott.trenda.net>
* and Kris Kowal <cixar.com/~kris.kowal/>
*
* Accepts a date, a mask, or a date and a mask.
* Returns a formatted version of the given date.
* The date defaults to the current date/time.
* The mask defaults to dateFormat.masks.default.
*/
var dateFormat = function() {
var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,
timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
timezoneClip = /[^-+\dA-Z]/g,
pad = function(val, len) {
val = String(val);
len = len || 2;
while (val.length < len) val = "0" + val;
return val;
};
// Regexes and supporting functions are cached through closure
return function(date, mask, utc) {
var dF = dateFormat;
// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {
mask = date;
date = undefined;
}
// Passing date through Date applies Date.parse, if necessary
date = date ? new Date(date) : new Date;
if (isNaN(date)) throw SyntaxError("invalid date");
mask = String(dF.masks[mask] || mask || dF.masks["default"]);
// Allow setting the utc argument via the mask
if (mask.slice(0, 4) == "UTC:") {
mask = mask.slice(4);
utc = true;
}
var _ = utc ? "getUTC" : "get",
d = date[_ + "Date"](),
D = date[_ + "Day"](),
m = date[_ + "Month"](),
y = date[_ + "FullYear"](),
H = date[_ + "Hours"](),
M = date[_ + "Minutes"](),
s = date[_ + "Seconds"](),
L = date[_ + "Milliseconds"](),
o = utc ? 0 : date.getTimezoneOffset(),
flags = {
d: d,
dd: pad(d),
ddd: dF.i18n.dayNames[D],
dddd: dF.i18n.dayNames[D + 7],
m: m + 1,
mm: pad(m + 1),
mmm: dF.i18n.monthNames[m],
mmmm: dF.i18n.monthNames[m + 12],
yy: String(y).slice(2),
yyyy: y,
h: H % 12 || 12,
hh: pad(H % 12 || 12),
H: H,
HH: pad(H),
M: M,
MM: pad(M),
s: s,
ss: pad(s),
l: pad(L, 3),
L: pad(L > 99 ? Math.round(L / 10) : L),
t: H < 12 ? "a" : "p",
tt: H < 12 ? "am" : "pm",
T: H < 12 ? "A" : "P",
TT: H < 12 ? "AM" : "PM",
Z: utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
o: (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
S: ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
};
return mask.replace(token, function($0) {
return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
});
};
}();
// Some common format strings
dateFormat.masks = {
"default": "ddd mmm dd yyyy HH:MM:ss",
shortDate: "m/d/yy",
mediumDate: "mmm d, yyyy",
longDate: "mmmm d, yyyy",
fullDate: "dddd, mmmm d, yyyy",
shortTime: "h:MM TT",
mediumTime: "h:MM:ss TT",
longTime: "h:MM:ss TT Z",
isoDate: "yyyy-mm-dd",
isoTime: "HH:MM:ss",
isoDateTime: "yyyy-mm-dd'T'HH:MM:ss",
isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};
// Internationalization strings
dateFormat.i18n = {
dayNames: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
monthNames: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
};
// For convenience...
Date.prototype.steveFormat = function(mask, utc) {
return dateFormat(this, mask, utc);
};
</script>
<script>
var m = moment();
var d = new Date();
var t = Math.round(+d / 1000);
var x = new XDate();
if (console && console.log) {
console.log(m.format('MM-DD-YYYY h:mm:ss a'), 'MomentJS format');
console.log(d.dateJSFormat('MM-dd-yyyy h:mm:ss tt'), 'DateJS format');
console.log(d.jwFormat('m-d-Y g:i:s a'), 'Jacob Wright format');
console.log(d.steveFormat('mm-dd-yyyy h:MM:ss tt'), 'Steve Levithan format');
console.log(date('m-d-Y g:i:s a', t), 'phpjs format');
console.log(x.toString('MM-dd-yyyy h:mm:ss tt'), 'xdate format');
}
</script>Ready to run.
| Test | Ops/sec | |
|---|---|---|
| MomentJS | | ready |
| DateJS | | ready |
| Jacob Wright | | ready |
| Steve Levithan | | ready |
| phpjs | | ready |
| XDate | | ready |
| adsf | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.