PerformanceTests/resources/results-template.html - external/WebKit_submodule - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <title>WebKit Performance Test Results</title>
 <script src="%AbsolutePathToWebKitTrunk%/PerformanceTests/Dromaeo/resources/dromaeo/web/lib/jquery-1.6.4.js"></script>
 <script src="https://trac.webkit.org/browser/trunk/PerformanceTests/Dromaeo/resources/dromaeo/web/lib/jquery-1.6.4.js?format=txt"></script>
 <script src="%AbsolutePathToWebKitTrunk%/PerformanceTests/resources/jquery.flot.min.js"></script>
 <script src="https://trac.webkit.org/browser/trunk/PerformanceTests/resources/jquery.flot.min.js?format=txt"></script>
 <script src="%AbsolutePathToWebKitTrunk%/PerformanceTests/resources/jquery.tablesorter.min.js"></script>
 <script src="https://trac.webkit.org/browser/trunk/PerformanceTests/resources/jquery.tablesorter.min.js?format=txt"></script>
 <script id="json" type="application/json">%PeformanceTestsResultsJSON%</script>
 <style type="text/css">

 section {
     background: white;
     padding: 10px;
     position: relative;
 }

 .time-plots {
     padding-left: 25px;
 }

 .time-plots > div {
     display: inline-block;
     width: 90px;
     height: 40px;
     margin-right: 10px;
 }

 section h1 {
     text-align: center;
     font-size: 1em;
 }

 section .tooltip {
     position: absolute;
     text-align: center;
     background: #ffcc66;
     border-radius: 5px;
     padding: 0px 5px;
 }

 body {
     padding: 0px;
     margin: 0px;
     font-family: sans-serif;
 }

 table {
     background: white;
     width: 100%;
 }

 table, td, th {
     border-collapse: collapse;
     padding: 5px;
 }

 tr.even {
     background: #f6f6f6;
 }

 table td {
     position: relative;
     font-family: monospace;
 }

 th, td {
     cursor: pointer;
     cursor: hand;
 }

 th {
     background: #e6eeee;
     background: -webkit-gradient(linear, left top, left bottom, from(rgb(244, 244, 244)), to(rgb(217, 217, 217)));
     border: 1px solid #ccc;
 }

 th:after {
     content: ' \25B8';
 }

 th.headerSortUp:after {
     content: ' \25BE';
 }

 th.headerSortDown:after {
     content: ' \25B4';
 }

 td.comparison, td.result {
     text-align: right;
 }

 td.better {
     color: #6c6;
 }

 td.worse {
     color: #c66;
 }

 .checkbox {
     display: inline-block;
     background: #eee;
     background: -webkit-gradient(linear, left bottom, left top, from(rgb(220, 220, 220)), to(rgb(200, 200, 200)));
     border: inset 1px #ddd;
     border-radius: 5px;
     margin: 10px;
     font-size: small;
     cursor: pointer;
     cursor: hand;
     -webkit-user-select: none;
     font-weight: bold;
 }

 .checkbox span {
     display: inline-block;
     line-height: 100%;
     padding: 5px 8px;
     border: outset 1px transparent;
 }

 .checkbox .checked {
     background: #e6eeee;
     background: -webkit-gradient(linear, left top, left bottom, from(rgb(255, 255, 255)), to(rgb(235, 235, 235)));
     border: outset 1px #eee;
     border-radius: 5px;
 }

 </style>
 </head>
 <body>
 <div style="padding: 0 10px;">
 Result <span id="time-memory" class="checkbox"><span class="checked">Time</span><span>Memory</span></span>
 Reference <span id="reference" class="checkbox"></span>
 </div>
 <script>

 $(document).ready(function () {
     $('.checkbox').each(function (index, checkbox) {
         $(checkbox).children('span').click(function (event) {
             if ($(this).hasClass('checked'))
                 return;
             $(checkbox).children('span').removeClass('checked');
             $(this).addClass('checked');
             $(checkbox).trigger('change', $(this));
         });
     });
 })

 </script>
 <table id="container"></table>
 <script>

 function TestResult(associatedTest, result, associatedRun) {
     this.unit = function () { return result.unit; }
     this.test = function () { return associatedTest; }
     this.values = function () { return result.values ? result.values.map(function (value) { return associatedTest.scalingFactor() * value; }) : undefined; }
     this.unscaledMean = function () { return result.avg; }
     this.mean = function () { return associatedTest.scalingFactor() * result.avg; }
     this.min = function () { return associatedTest.scalingFactor() * result.min; }
     this.max = function () { return associatedTest.scalingFactor() * result.max; }
     this.stdev = function () { return associatedTest.scalingFactor() * result.stdev; }
     this.stdevRatio = function () { return result.stdev / result.avg; }
     this.percentDifference = function(other) { return (other.mean() - this.mean()) / this.mean(); }
     this.isStatisticallySignificant = function (other) {
         var diff = Math.abs(other.mean() - this.mean());
         return diff > this.stdev() && diff > other.stdev();
     }
     this.run = function () { return associatedRun; }
 }

 function TestRun(entry) {
     this.description = function () { return entry['description']; }
     this.webkitRevision = function () { return entry['webkit-revision']; }
     this.label = function () {
         var label = 'r' + this.webkitRevision();
         if (this.description())
             label += ' &dash; ' + this.description();
         return label;
     }
 }

 function PerfTest(name) {
     var testResults = [];
     var cachedUnit = null;
     var cachedScalingFactor = null;

     // We can't do this in TestResult because all results for each test need to share the same unit and the same scaling factor.
     function computeScalingFactorIfNeeded() {
         // FIXME: We shouldn't be adjusting units on every test result.
         // We can only do this on the first test.
         if (!testResults.length || cachedUnit)
             return;

         var unit = testResults[0].unit(); // FIXME: We should verify that all results have the same unit.
         var mean = testResults[0].unscaledMean(); // FIXME: We should look at all values.
         var kilo = unit == 'bytes' ? 1024 : 1000;
         if (mean > 10 * kilo * kilo && unit != 'ms') {
             cachedScalingFactor = 1 / kilo / kilo;
             cachedUnit = 'M ' + unit;
         } else if (mean > 10 * kilo) {
             cachedScalingFactor = 1 / kilo;
             cachedUnit = unit == 'ms' ? 's' : ('K ' + unit);
         } else {
             cachedScalingFactor = 1;
             cachedUnit = unit;
         }
     }

     this.name = function () { return name; }
     this.isMemoryTest = function () { return name.indexOf(':') >= 0; }
     this.addResult = function (newResult) {
         testResults.push(newResult);
         cachedUnit = null;
         cachedScalingFactor = null;
     }
     this.results = function () { return testResults; }
     this.scalingFactor = function() {
         computeScalingFactorIfNeeded();
         return cachedScalingFactor;
     }
     this.unit = function () {
         computeScalingFactorIfNeeded();
         return cachedUnit;
     }
     this.smallerIsBetter = function () { return this.unit() == 'ms' || this.unit() == 'bytes'; }
 }

 var plotColor = 'rgb(230,50,50)';
 var subpointsPlotOptions = {
     lines: {show:true, lineWidth: 0},
     color: plotColor,
     points: {show: true, radius: 1},
     bars: {show: false}};

 var mainPlotOptions = {
     xaxis: {
         min: -0.5,
         tickSize: 1,
     },
     crosshair: { mode: 'y' },
     series: { shadowSize: 0 },
     bars: {show: true, align: 'center', barWidth: 0.5},
     lines: { show: false },
     points: { show: true },
     grid: {
         borderWidth: 1,
         borderColor: '#ccc',
         backgroundColor: '#fff',
         hoverable: true,
         autoHighlight: false,
     }
 };

 var timePlotOptions = {
     yaxis: { show: false },
     xaxis: { show: false },
     lines: { show: true },
     grid: { borderWidth: 1, borderColor: '#ccc' },
     colors: [ plotColor ]
 };

 function createPlot(container, test) {
     var section = $('<section><div class="plot"></div><div class="time-plots"></div>'
         + '<span class="tooltip"></span></section>');
     section.children('.plot').css({'width': (100 * test.results().length + 25) + 'px', 'height': '300px'});
     $(container).append(section);

     var plotContainer = section.children('.plot');
     var minIsZero = true;
     attachPlot(test, plotContainer, minIsZero);

     attachTimePlots(test, section.children('.time-plots'));

     var tooltip = section.children('.tooltip');
     plotContainer.bind('plothover', function (event, position, item) {
         if (item) {
             var postfix = item.series.id ? ' (' + item.series.id + ')' : '';
             tooltip.html(item.datapoint[1].toPrecision(4) + postfix);
             var sectionOffset = $(section).offset();
             tooltip.css({left: item.pageX - sectionOffset.left - tooltip.outerWidth() / 2, top: item.pageY - sectionOffset.top + 10});
             tooltip.fadeIn(200);
         } else
             tooltip.hide();
     });
     plotContainer.mouseout(function () {
         tooltip.hide();
     });
     plotContainer.click(function (event) {
         event.preventDefault();
         minIsZero = !minIsZero;
         attachPlot(test, plotContainer, minIsZero);
     });

     return section;
 }

 function attachTimePlots(test, container) {
     var results = test.results();
     var attachedPlot = false;
     for (var i = 0; i < results.length; i++) {
         container.append('<div></div>');
         var values = results[i].values();
         if (!values)
             continue;
         attachedPlot = true;

         $.plot(container.children().last(), [values.map(function (value, index) { return [index, value]; })],
             $.extend(true, {}, timePlotOptions, {yaxis: {min: Math.min.apply(Math, values) * 0.9, max: Math.max.apply(Math, values) * 1.1},
                 xaxis: {min: -0.5, max: values.length - 0.5}}));
     }
     if (!attachedPlot)
         container.children().remove();
 }

 function attachPlot(test, plotContainer, minIsZero) {
     var results = test.results();

     var values = results.reduce(function (values, result, index) {
         var newValues = result.values();
         return newValues ? values.concat(newValues.map(function (value) { return [index, value]; })) : values;
     }, []);

     var plotData = [];
     if (values.length)
         plotData = [$.extend(true, {}, subpointsPlotOptions, {data: values})];
     else {
         function makeSubpoints(id, callback) { return $.extend(true, {}, subpointsPlotOptions, {id: id, data: results.map(callback)}); }
         plotData = [makeSubpoints('min', function (result, index) { return [index, result.min()]; }),
         makeSubpoints('max', function (result, index) { return [index, result.max()]; }),
         makeSubpoints('-&#963;', function (result, index) { return [index, result.mean() - result.stdev()]; }),
         makeSubpoints('+&#963;', function (result, index) { return [index, result.mean() + result.stdev()]; })];
     }

     plotData.push({id: '&mu;', data: results.map(function (result, index) { return [index, result.mean()]; }), color: plotColor});

     var currentPlotOptions = $.extend(true, {}, mainPlotOptions, {yaxis: {
         min: minIsZero ? 0 : Math.min.apply(Math, results.map(function (result, index) { return result.min(); })) * 0.98,
         max: Math.max.apply(Math, results.map(function (result, index) { return result.max(); })) * (minIsZero ? 1.1 : 1.01)}});

     currentPlotOptions.xaxis.max = results.length - 0.5;
     currentPlotOptions.xaxis.ticks = results.map(function (result, index) { return [index, result.run().label()]; });

     $.plot(plotContainer, plotData, currentPlotOptions);
 }

 function toFixedWidthPrecision(value) {
     var decimal = value.toFixed(2);
     return decimal;
 }

 function formatPercentage(fraction) {
     var percentage = fraction * 100;
     return (fraction * 100).toFixed(2) + '%';
 }

 function createTable(tests, runs, shouldIgnoreMemory, referenceIndex) {
     $('#container').html('<thead><tr><th>Test</th><th>Unit</th>' + runs.map(function (run, index) {
         return '<th colspan="' + (index == referenceIndex ? 2 : 3) + '" class="{sorter: \'comparison\'}">' + run.label() + '</th>';
     }).reduce(function (markup, cell) { return markup + cell; }, '') + '</tr></head><tbody></tbody>');

     var testNames = [];
     for (testName in tests)
         testNames.push(testName);

     testNames.sort().map(function (testName) {
         var test = tests[testName];
         if (test.isMemoryTest() != shouldIgnoreMemory)
             createTableRow(test, test.results()[referenceIndex]);
     });

     $('#container').tablesorter({widgets: ['zebra']});
 }

 function linearRegression(points) {
     // Implement http://www.easycalculation.com/statistics/learn-correlation.php.
     // x = magnitude
     // y = iterations
     var sumX = 0;
     var sumY = 0;
     var sumXSquared = 0;
     var sumYSquared = 0;
     var sumXTimesY = 0;

     for (var i = 0; i < points.length; i++) {
         var x = i;
         var y = points[i];
         sumX += x;
         sumY += y;
         sumXSquared += x * x;
         sumYSquared += y * y;
         sumXTimesY += x * y;
     }

     var r = (points.length * sumXTimesY - sumX * sumY) /
         Math.sqrt((points.length * sumXSquared - sumX * sumX) *
                   (points.length * sumYSquared - sumY * sumY));

     if (isNaN(r) || r == Math.Infinity)
         r = 0;

     var slope = (points.length * sumXTimesY - sumX * sumY) / (points.length * sumXSquared - sumX * sumX);
     var intercept = sumY / points.length - slope * sumX / points.length;
     return {slope: slope, intercept: intercept, rSquared: r * r};
 }

 var warningSign = '<svg viewBox="0 0 100 100" style="width: 18px; height: 18px; vertical-align: bottom;" version="1.1">'
     + '<polygon fill="red" points="50,10 90,80 10,80 50,10" stroke="red" stroke-width="10" stroke-linejoin="round" />'
     + '<polygon fill="white" points="47,30 48,29, 50, 28.7, 52,29 53,30 50,60" stroke="white" stroke-width="10" stroke-linejoin="round" />'
     + '<circle cx="50" cy="73" r="6" fill="white" />'
     + '</svg>';

 function createTableRow(test, referenceResult) {
     var tableRow = $('<tr><td class="test">' + test.name() + '</td><td class="unit">' + test.unit() + '</td></tr>');

     tableRow.append(test.results().map(function (result, index) {
         var secondCell = '';
         var hiddenValue = '';
         if (result !== referenceResult) {
             var percentDifference = referenceResult.percentDifference(result);
             var better = test.smallerIsBetter() ? percentDifference < 0 : percentDifference > 0;
             var comparison = '';
             var className = 'comparison';
             if (referenceResult.isStatisticallySignificant(result)) {
                 comparison = formatPercentage(Math.abs(percentDifference)) + (better ? ' Better' : ' Worse&nbsp;');
                 className += better ? ' better' : ' worse';
             }
             hiddenValue = '<span style="display: none">|' + comparison + '</span>';
             secondCell = '</td><td class="' + className + '">' + comparison;
         }

         var values = result.values();
         var warning = '';
         var regressionAnalysis = '';
         if (values && values.length > 3) {
             regressionResult = linearRegression(values);
             regressionAnalysis = 'slope=' + toFixedWidthPrecision(regressionResult.slope)
                 + ', R^2=' + toFixedWidthPrecision(regressionResult.rSquared);
             if (regressionResult.rSquared > 0.6 && Math.abs(regressionResult.slope) > 0.01) {
                 warning = ' <span class="regression-warning" title="Detected a time dependency with ' + regressionAnalysis + '">' + warningSign + ' </span>';
             }
         }

         var statistics = '&sigma;=' + toFixedWidthPrecision(result.stdev()) + ', min=' + toFixedWidthPrecision(result.min())
             + ', max=' + toFixedWidthPrecision(result.max()) + '\n' + regressionAnalysis;

         // Tablesorter doesn't know about the second cell so put the comparison in the invisible element.
         return '<td class="result" title="' + statistics + '">' + toFixedWidthPrecision(result.mean()) + hiddenValue
             + '</td><td class="stdev" title="' + statistics + '">&plusmn; '
             + formatPercentage(result.stdevRatio()) + warning + secondCell + '</td>';
     }).reduce(function (markup, cell) { return markup + cell; }, ''));

     $('#container').children('tbody').last().append(tableRow);

     tableRow.click(function (event) {
         if (event.target != tableRow[0] && event.target.parentNode != tableRow[0])
             return;

         event.preventDefault();

         var firstCell = tableRow.children('td').first();
         if (firstCell.children('section').length) {
             firstCell.children('section').remove();
             tableRow.children('td').css({'padding-bottom': ''});
         } else {
             var plot = createPlot(firstCell, test);
             plot.css({'position': 'absolute', 'z-index': 2});
             var offset = tableRow.offset();
             offset.left += 1;
             offset.top += tableRow.outerHeight();
             plot.offset(offset);
             tableRow.children('td').css({'padding-bottom': plot.outerHeight() + 5});
         }

         return false;
     });
 }

 function init() {
     $.tablesorter.addParser({
         id: 'comparison',
         is: function(s) {
             return s.indexOf('|') >= 0;
         },
         format: function(s) {
             var parsed = parseFloat(s.substring(s.indexOf('|') + 1));
             return isNaN(parsed) ? 0 : parsed;
         },
         type: 'numeric',
     });

     var runs = [];
     var tests = {};
     $.each(JSON.parse(document.getElementById('json').textContent), function (index, entry) {
         var run = new TestRun(entry);
         runs.push(run);
         $.each(entry.results, function (test, result) {
             if (!tests[test])
                 tests[test] = new PerfTest(test);
             tests[test].addResult(new TestResult(tests[test], result, run));
         });
     });

     var shouldIgnoreMemory= true;
     var referenceIndex = 0;
     createTable(tests, runs, shouldIgnoreMemory, referenceIndex);

     $('#time-memory').bind('change', function (event, checkedElement) {
         shouldIgnoreMemory = checkedElement.textContent == 'Time';
         createTable(tests, runs, shouldIgnoreMemory, referenceIndex);
     });

     runs.map(function (run, index) {
         $('#reference').append('<span value="' + index + '"' + (index == referenceIndex ? ' class="checked"' : '') + '>' + run.label() + '</span>');
     })

     $('#reference').bind('change', function (event, checkedElement) {
         referenceIndex = parseInt(checkedElement.getAttribute('value'));
         createTable(tests, runs, shouldIgnoreMemory, referenceIndex);
     });
 }

 init();

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>WebKit Performance Test Results</title>
	<script src="%AbsolutePathToWebKitTrunk%/PerformanceTests/Dromaeo/resources/dromaeo/web/lib/jquery-1.6.4.js"></script>
	<script src="https://trac.webkit.org/browser/trunk/PerformanceTests/Dromaeo/resources/dromaeo/web/lib/jquery-1.6.4.js?format=txt"></script>
	<script src="%AbsolutePathToWebKitTrunk%/PerformanceTests/resources/jquery.flot.min.js"></script>
	<script src="https://trac.webkit.org/browser/trunk/PerformanceTests/resources/jquery.flot.min.js?format=txt"></script>
	<script src="%AbsolutePathToWebKitTrunk%/PerformanceTests/resources/jquery.tablesorter.min.js"></script>
	<script src="https://trac.webkit.org/browser/trunk/PerformanceTests/resources/jquery.tablesorter.min.js?format=txt"></script>
	<script id="json" type="application/json">%PeformanceTestsResultsJSON%</script>
	<style type="text/css">

	section {
	background: white;
	padding: 10px;
	position: relative;
	}

	.time-plots {
	padding-left: 25px;
	}

	.time-plots > div {
	display: inline-block;
	width: 90px;
	height: 40px;
	margin-right: 10px;
	}

	section h1 {
	text-align: center;
	font-size: 1em;
	}

	section .tooltip {
	position: absolute;
	text-align: center;
	background: #ffcc66;
	border-radius: 5px;
	padding: 0px 5px;
	}

	body {
	padding: 0px;
	margin: 0px;
	font-family: sans-serif;
	}

	table {
	background: white;
	width: 100%;
	}

	table, td, th {
	border-collapse: collapse;
	padding: 5px;
	}

	tr.even {
	background: #f6f6f6;
	}

	table td {
	position: relative;
	font-family: monospace;
	}

	th, td {
	cursor: pointer;
	cursor: hand;
	}

	th {
	background: #e6eeee;
	background: -webkit-gradient(linear, left top, left bottom, from(rgb(244, 244, 244)), to(rgb(217, 217, 217)));
	border: 1px solid #ccc;
	}

	th:after {
	content: ' \25B8';
	}

	th.headerSortUp:after {
	content: ' \25BE';
	}

	th.headerSortDown:after {
	content: ' \25B4';
	}

	td.comparison, td.result {
	text-align: right;
	}

	td.better {
	color: #6c6;
	}

	td.worse {
	color: #c66;
	}

	.checkbox {
	display: inline-block;
	background: #eee;
	background: -webkit-gradient(linear, left bottom, left top, from(rgb(220, 220, 220)), to(rgb(200, 200, 200)));
	border: inset 1px #ddd;
	border-radius: 5px;
	margin: 10px;
	font-size: small;
	cursor: pointer;
	cursor: hand;
	-webkit-user-select: none;
	font-weight: bold;
	}

	.checkbox span {
	display: inline-block;
	line-height: 100%;
	padding: 5px 8px;
	border: outset 1px transparent;
	}

	.checkbox .checked {
	background: #e6eeee;
	background: -webkit-gradient(linear, left top, left bottom, from(rgb(255, 255, 255)), to(rgb(235, 235, 235)));
	border: outset 1px #eee;
	border-radius: 5px;
	}

	</style>
	</head>
	<body>
	<div style="padding: 0 10px;">
	Result <span id="time-memory" class="checkbox"><span class="checked">Time</span><span>Memory</span></span>
	Reference <span id="reference" class="checkbox"></span>
	</div>
	<script>

	$(document).ready(function () {
	$('.checkbox').each(function (index, checkbox) {
	$(checkbox).children('span').click(function (event) {
	if ($(this).hasClass('checked'))
	return;
	$(checkbox).children('span').removeClass('checked');
	$(this).addClass('checked');
	$(checkbox).trigger('change', $(this));
	});
	});
	})

	</script>
	<table id="container"></table>
	<script>

	function TestResult(associatedTest, result, associatedRun) {
	this.unit = function () { return result.unit; }
	this.test = function () { return associatedTest; }
	this.values = function () { return result.values ? result.values.map(function (value) { return associatedTest.scalingFactor() * value; }) : undefined; }
	this.unscaledMean = function () { return result.avg; }
	this.mean = function () { return associatedTest.scalingFactor() * result.avg; }
	this.min = function () { return associatedTest.scalingFactor() * result.min; }
	this.max = function () { return associatedTest.scalingFactor() * result.max; }
	this.stdev = function () { return associatedTest.scalingFactor() * result.stdev; }
	this.stdevRatio = function () { return result.stdev / result.avg; }
	this.percentDifference = function(other) { return (other.mean() - this.mean()) / this.mean(); }
	this.isStatisticallySignificant = function (other) {
	var diff = Math.abs(other.mean() - this.mean());
	return diff > this.stdev() && diff > other.stdev();
	}
	this.run = function () { return associatedRun; }
	}

	function TestRun(entry) {
	this.description = function () { return entry['description']; }
	this.webkitRevision = function () { return entry['webkit-revision']; }
	this.label = function () {
	var label = 'r' + this.webkitRevision();
	if (this.description())
	label += ' &dash; ' + this.description();
	return label;
	}
	}

	function PerfTest(name) {
	var testResults = [];
	var cachedUnit = null;
	var cachedScalingFactor = null;

	// We can't do this in TestResult because all results for each test need to share the same unit and the same scaling factor.
	function computeScalingFactorIfNeeded() {
	// FIXME: We shouldn't be adjusting units on every test result.
	// We can only do this on the first test.
	if (!testResults.length \|\| cachedUnit)
	return;

	var unit = testResults[0].unit(); // FIXME: We should verify that all results have the same unit.
	var mean = testResults[0].unscaledMean(); // FIXME: We should look at all values.
	var kilo = unit == 'bytes' ? 1024 : 1000;
	if (mean > 10 * kilo * kilo && unit != 'ms') {
	cachedScalingFactor = 1 / kilo / kilo;
	cachedUnit = 'M ' + unit;
	} else if (mean > 10 * kilo) {
	cachedScalingFactor = 1 / kilo;
	cachedUnit = unit == 'ms' ? 's' : ('K ' + unit);
	} else {
	cachedScalingFactor = 1;
	cachedUnit = unit;
	}
	}

	this.name = function () { return name; }
	this.isMemoryTest = function () { return name.indexOf(':') >= 0; }
	this.addResult = function (newResult) {
	testResults.push(newResult);
	cachedUnit = null;
	cachedScalingFactor = null;
	}
	this.results = function () { return testResults; }
	this.scalingFactor = function() {
	computeScalingFactorIfNeeded();
	return cachedScalingFactor;
	}
	this.unit = function () {
	computeScalingFactorIfNeeded();
	return cachedUnit;
	}
	this.smallerIsBetter = function () { return this.unit() == 'ms' \|\| this.unit() == 'bytes'; }
	}

	var plotColor = 'rgb(230,50,50)';
	var subpointsPlotOptions = {
	lines: {show:true, lineWidth: 0},
	color: plotColor,
	points: {show: true, radius: 1},
	bars: {show: false}};

	var mainPlotOptions = {
	xaxis: {
	min: -0.5,
	tickSize: 1,
	},
	crosshair: { mode: 'y' },
	series: { shadowSize: 0 },
	bars: {show: true, align: 'center', barWidth: 0.5},
	lines: { show: false },
	points: { show: true },
	grid: {
	borderWidth: 1,
	borderColor: '#ccc',
	backgroundColor: '#fff',
	hoverable: true,
	autoHighlight: false,
	}
	};

	var timePlotOptions = {
	yaxis: { show: false },
	xaxis: { show: false },
	lines: { show: true },
	grid: { borderWidth: 1, borderColor: '#ccc' },
	colors: [ plotColor ]
	};

	function createPlot(container, test) {
	var section = $('<section><div class="plot"></div><div class="time-plots"></div>'
	+ '<span class="tooltip"></span></section>');
	section.children('.plot').css({'width': (100 * test.results().length + 25) + 'px', 'height': '300px'});
	$(container).append(section);

	var plotContainer = section.children('.plot');
	var minIsZero = true;
	attachPlot(test, plotContainer, minIsZero);

	attachTimePlots(test, section.children('.time-plots'));

	var tooltip = section.children('.tooltip');
	plotContainer.bind('plothover', function (event, position, item) {
	if (item) {
	var postfix = item.series.id ? ' (' + item.series.id + ')' : '';
	tooltip.html(item.datapoint[1].toPrecision(4) + postfix);
	var sectionOffset = $(section).offset();
	tooltip.css({left: item.pageX - sectionOffset.left - tooltip.outerWidth() / 2, top: item.pageY - sectionOffset.top + 10});
	tooltip.fadeIn(200);
	} else
	tooltip.hide();
	});
	plotContainer.mouseout(function () {
	tooltip.hide();
	});
	plotContainer.click(function (event) {
	event.preventDefault();
	minIsZero = !minIsZero;
	attachPlot(test, plotContainer, minIsZero);
	});

	return section;
	}

	function attachTimePlots(test, container) {
	var results = test.results();
	var attachedPlot = false;
	for (var i = 0; i < results.length; i++) {
	container.append('<div></div>');
	var values = results[i].values();
	if (!values)
	continue;
	attachedPlot = true;

	$.plot(container.children().last(), [values.map(function (value, index) { return [index, value]; })],
	$.extend(true, {}, timePlotOptions, {yaxis: {min: Math.min.apply(Math, values) * 0.9, max: Math.max.apply(Math, values) * 1.1},
	xaxis: {min: -0.5, max: values.length - 0.5}}));
	}
	if (!attachedPlot)
	container.children().remove();
	}

	function attachPlot(test, plotContainer, minIsZero) {
	var results = test.results();

	var values = results.reduce(function (values, result, index) {
	var newValues = result.values();
	return newValues ? values.concat(newValues.map(function (value) { return [index, value]; })) : values;
	}, []);

	var plotData = [];
	if (values.length)
	plotData = [$.extend(true, {}, subpointsPlotOptions, {data: values})];
	else {
	function makeSubpoints(id, callback) { return $.extend(true, {}, subpointsPlotOptions, {id: id, data: results.map(callback)}); }
	plotData = [makeSubpoints('min', function (result, index) { return [index, result.min()]; }),
	makeSubpoints('max', function (result, index) { return [index, result.max()]; }),
	makeSubpoints('-σ', function (result, index) { return [index, result.mean() - result.stdev()]; }),
	makeSubpoints('+σ', function (result, index) { return [index, result.mean() + result.stdev()]; })];
	}

	plotData.push({id: 'μ', data: results.map(function (result, index) { return [index, result.mean()]; }), color: plotColor});

	var currentPlotOptions = $.extend(true, {}, mainPlotOptions, {yaxis: {
	min: minIsZero ? 0 : Math.min.apply(Math, results.map(function (result, index) { return result.min(); })) * 0.98,
	max: Math.max.apply(Math, results.map(function (result, index) { return result.max(); })) * (minIsZero ? 1.1 : 1.01)}});

	currentPlotOptions.xaxis.max = results.length - 0.5;
	currentPlotOptions.xaxis.ticks = results.map(function (result, index) { return [index, result.run().label()]; });

	$.plot(plotContainer, plotData, currentPlotOptions);
	}

	function toFixedWidthPrecision(value) {
	var decimal = value.toFixed(2);
	return decimal;
	}

	function formatPercentage(fraction) {
	var percentage = fraction * 100;
	return (fraction * 100).toFixed(2) + '%';
	}

	function createTable(tests, runs, shouldIgnoreMemory, referenceIndex) {
	$('#container').html('<thead><tr><th>Test</th><th>Unit</th>' + runs.map(function (run, index) {
	return '<th colspan="' + (index == referenceIndex ? 2 : 3) + '" class="{sorter: \'comparison\'}">' + run.label() + '</th>';
	}).reduce(function (markup, cell) { return markup + cell; }, '') + '</tr></head><tbody></tbody>');

	var testNames = [];
	for (testName in tests)
	testNames.push(testName);

	testNames.sort().map(function (testName) {
	var test = tests[testName];
	if (test.isMemoryTest() != shouldIgnoreMemory)
	createTableRow(test, test.results()[referenceIndex]);
	});

	$('#container').tablesorter({widgets: ['zebra']});
	}

	function linearRegression(points) {
	// Implement http://www.easycalculation.com/statistics/learn-correlation.php.
	// x = magnitude
	// y = iterations
	var sumX = 0;
	var sumY = 0;
	var sumXSquared = 0;
	var sumYSquared = 0;
	var sumXTimesY = 0;

	for (var i = 0; i < points.length; i++) {
	var x = i;
	var y = points[i];
	sumX += x;
	sumY += y;
	sumXSquared += x * x;
	sumYSquared += y * y;
	sumXTimesY += x * y;
	}

	var r = (points.length * sumXTimesY - sumX * sumY) /
	Math.sqrt((points.length * sumXSquared - sumX * sumX) *
	(points.length * sumYSquared - sumY * sumY));

	if (isNaN(r) \|\| r == Math.Infinity)
	r = 0;

	var slope = (points.length * sumXTimesY - sumX * sumY) / (points.length * sumXSquared - sumX * sumX);
	var intercept = sumY / points.length - slope * sumX / points.length;
	return {slope: slope, intercept: intercept, rSquared: r * r};
	}

	var warningSign = '<svg viewBox="0 0 100 100" style="width: 18px; height: 18px; vertical-align: bottom;" version="1.1">'
	+ '<polygon fill="red" points="50,10 90,80 10,80 50,10" stroke="red" stroke-width="10" stroke-linejoin="round" />'
	+ '<polygon fill="white" points="47,30 48,29, 50, 28.7, 52,29 53,30 50,60" stroke="white" stroke-width="10" stroke-linejoin="round" />'
	+ '<circle cx="50" cy="73" r="6" fill="white" />'
	+ '</svg>';

	function createTableRow(test, referenceResult) {
	var tableRow = $('<tr><td class="test">' + test.name() + '</td><td class="unit">' + test.unit() + '</td></tr>');

	tableRow.append(test.results().map(function (result, index) {
	var secondCell = '';
	var hiddenValue = '';
	if (result !== referenceResult) {
	var percentDifference = referenceResult.percentDifference(result);
	var better = test.smallerIsBetter() ? percentDifference < 0 : percentDifference > 0;
	var comparison = '';
	var className = 'comparison';
	if (referenceResult.isStatisticallySignificant(result)) {
	comparison = formatPercentage(Math.abs(percentDifference)) + (better ? ' Better' : ' Worse ');
	className += better ? ' better' : ' worse';
	}
	hiddenValue = '<span style="display: none">\|' + comparison + '</span>';
	secondCell = '</td><td class="' + className + '">' + comparison;
	}

	var values = result.values();
	var warning = '';
	var regressionAnalysis = '';
	if (values && values.length > 3) {
	regressionResult = linearRegression(values);
	regressionAnalysis = 'slope=' + toFixedWidthPrecision(regressionResult.slope)
	+ ', R^2=' + toFixedWidthPrecision(regressionResult.rSquared);
	if (regressionResult.rSquared > 0.6 && Math.abs(regressionResult.slope) > 0.01) {
	warning = ' <span class="regression-warning" title="Detected a time dependency with ' + regressionAnalysis + '">' + warningSign + ' </span>';
	}
	}

	var statistics = 'σ=' + toFixedWidthPrecision(result.stdev()) + ', min=' + toFixedWidthPrecision(result.min())
	+ ', max=' + toFixedWidthPrecision(result.max()) + '\n' + regressionAnalysis;

	// Tablesorter doesn't know about the second cell so put the comparison in the invisible element.
	return '<td class="result" title="' + statistics + '">' + toFixedWidthPrecision(result.mean()) + hiddenValue
	+ '</td><td class="stdev" title="' + statistics + '">± '
	+ formatPercentage(result.stdevRatio()) + warning + secondCell + '</td>';
	}).reduce(function (markup, cell) { return markup + cell; }, ''));

	$('#container').children('tbody').last().append(tableRow);

	tableRow.click(function (event) {
	if (event.target != tableRow[0] && event.target.parentNode != tableRow[0])
	return;

	event.preventDefault();

	var firstCell = tableRow.children('td').first();
	if (firstCell.children('section').length) {
	firstCell.children('section').remove();
	tableRow.children('td').css({'padding-bottom': ''});
	} else {
	var plot = createPlot(firstCell, test);
	plot.css({'position': 'absolute', 'z-index': 2});
	var offset = tableRow.offset();
	offset.left += 1;
	offset.top += tableRow.outerHeight();
	plot.offset(offset);
	tableRow.children('td').css({'padding-bottom': plot.outerHeight() + 5});
	}

	return false;
	});
	}

	function init() {
	$.tablesorter.addParser({
	id: 'comparison',
	is: function(s) {
	return s.indexOf('\|') >= 0;
	},
	format: function(s) {
	var parsed = parseFloat(s.substring(s.indexOf('\|') + 1));
	return isNaN(parsed) ? 0 : parsed;
	},
	type: 'numeric',
	});

	var runs = [];
	var tests = {};
	$.each(JSON.parse(document.getElementById('json').textContent), function (index, entry) {
	var run = new TestRun(entry);
	runs.push(run);
	$.each(entry.results, function (test, result) {
	if (!tests[test])
	tests[test] = new PerfTest(test);
	tests[test].addResult(new TestResult(tests[test], result, run));
	});
	});

	var shouldIgnoreMemory= true;
	var referenceIndex = 0;
	createTable(tests, runs, shouldIgnoreMemory, referenceIndex);

	$('#time-memory').bind('change', function (event, checkedElement) {
	shouldIgnoreMemory = checkedElement.textContent == 'Time';
	createTable(tests, runs, shouldIgnoreMemory, referenceIndex);
	});

	runs.map(function (run, index) {
	$('#reference').append('<span value="' + index + '"' + (index == referenceIndex ? ' class="checked"' : '') + '>' + run.label() + '</span>');
	})

	$('#reference').bind('change', function (event, checkedElement) {
	referenceIndex = parseInt(checkedElement.getAttribute('value'));
	createTable(tests, runs, shouldIgnoreMemory, referenceIndex);
	});
	}

	init();

	</script>
	</body>
	</html>