JsPerf

## README.md

      
        

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              README.md
            
          
        
      
    
  
    JsPerf
Test cases for javascript browser profiling.

  

  

## array-join.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>String Concat</title>
</head>
<body>
    Status: <span id="status">Idle</span>

    <script>
        function run() {
            document.getElementById("status").textContent = "Running";

            array = ['A', 'B', 'C', 'D', 'E', 'F', 'G'];

            function join(array) {
                return array.join(' ');
            }

            function reduce(array) {
                return array.reduce(function(p, c) {
                    return p + ' ' + c;
                });
            }

            function arrayConcat(array) {
                if(!array.length) return;
                var result = array[0];
                for(var i = 1; i < array.length; i++) {
                    result += ' ' + array[i];
                }

                return result;
            }

            function arrayConcatCacheLength(array) {
                var length = array.length;
                if(!length) return;
                var result = array[0];
                for(var i = 1; i < length; i++) {
                    result += ' ' + array[i];
                }

                return result;
            }

            function staticConcat() {
                return 'A' + ' ' + 'B' + ' ' +  'C' + ' ' + 'D' + ' ' + 'E' + ' ' + 'F' + ' ' + 'G';
            }

            for (var i = 0; i < 100000; i++) {
                join(array);
                reduce(array);
                arrayConcat(array);
                arrayConcatCacheLength(array);
                staticConcat();
            }

            document.getElementById("status").textContent = "DONE!";
            console.log('DONE!');
        }

        setTimeout(run, 1000);
    </script>
</body>
</html>

## date-instance.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Date Object Check & getTime</title>
</head>
<body>
Status: <span id="status">Idle</span>

<script>
    function run() {
        document.getElementById("status").textContent = "Running";

        function auto(value) {
            return +value;
        }

        function instance(value) {
            return value instanceof Date ? value.getTime() : value;
        }

        function duck(value) {
            return value.getTime ? value.getTime() : value;
        }

        var number, date;

        for (var i = 0; i < 100000; i++) {
            number = Math.floor(Math.random()*1000);
            date = new Date(number);

            auto(number);
            auto(date);

            instance(number);
            instance(date);

            duck(number);
            duck(date);
        }

        document.getElementById("status").textContent = "DONE!";
        console.log('DONE!');
    }

    setTimeout(run, 1000);
</script>
</body>
</html>

## number-tostring.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Number To String</title>
</head>
<body>
    Status: <span id="status">Idle</span>

    <script>
        function run() {
            document.getElementById("status").textContent = "Running";

            function toString(value) {
                return value.toString();
            }

            function constructor(value) {
                return String(value);
            }

            function implicit(value) {
                return '' + value;
            }

            var number;
            for (var i = 0; i < 100000; i++) {
                number = Math.floor(Math.random()*1000);
                toString(number);
                constructor(number);
                implicit(number);
            }

            document.getElementById("status").textContent = "DONE!";
            console.log('DONE!');
        }

        setTimeout(run, 1000);
    </script>
</body>
</html>