Run results for: toLocaleDateString_perf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Browser: Firefox 102

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
custom function	997075.4 Ops/sec
with toLocaleDateString	5741.2 Ops/sec

Script Preparation code:

Date.prototype.mmddyyyy = function() {         

    var yyyy = this.getFullYear().toString();                                    
    var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based         
    var dd  = this.getDate().toString();             

    return (mm[1]?mm:"0"+mm[0]) + '/' + (dd[1]?dd:"0"+dd[0]) + '/' + yyyy;
};

Tests:

custom function
var z = new Date().mmddyyyy();
with toLocaleDateString
var z = new Date().toLocaleDateString('en-US', { month: '2-digit', day: '2-digit', year: 'numeric' });

Run results for: toLocaleDateString_perf

Format date as string using custom function and toLocaleDateString

custom function

with toLocaleDateString