mirror of
https://gitlab.crans.org/bde/nk20
synced 2024-11-26 02:23:50 +00:00
53 lines
2.7 KiB
JavaScript
53 lines
2.7 KiB
JavaScript
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(function () {
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// Browser timing remains hidden unless we can successfully access the performance object
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var perf = window.performance || window.msPerformance ||
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window.webkitPerformance || window.mozPerformance;
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if (!perf)
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return;
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var rowCount = 0,
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timingOffset = perf.timing.navigationStart,
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timingEnd = perf.timing.loadEventEnd,
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totalTime = timingEnd - timingOffset;
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function getLeft(stat) {
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return ((perf.timing[stat] - timingOffset) / (totalTime)) * 100.0;
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}
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function getCSSWidth(stat, endStat) {
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var width = ((perf.timing[endStat] - perf.timing[stat]) / (totalTime)) * 100.0;
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// Calculate relative percent (same as sql panel logic)
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width = 100.0 * width / (100.0 - getLeft(stat));
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return (width < 1) ? "2px" : width + "%";
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}
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function addRow(stat, endStat) {
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rowCount++;
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var row = document.createElement('tr');
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row.className = (rowCount % 2) ? 'djDebugOdd' : 'djDebugEven';
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if (endStat) {
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// Render a start through end bar
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row.innerHTML = '<td>' + stat.replace('Start', '') + '</td>' +
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'<td class="djdt-timeline"><div class="djDebugTimeline"><div class="djDebugLineChart"><strong> </strong></div></div></td>' +
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'<td>' + (perf.timing[stat] - timingOffset) + ' (+' + (perf.timing[endStat] - perf.timing[stat]) + ')</td>';
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row.querySelector('strong').style.width = getCSSWidth(stat, endStat);
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} else {
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// Render a point in time
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row.innerHTML = '<td>' + stat + '</td>' +
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'<td class="djdt-timeline"><div class="djDebugTimeline"><div class="djDebugLineChart"><strong> </strong></div></div></td>' +
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'<td>' + (perf.timing[stat] - timingOffset) + '</td>';
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row.querySelector('strong').style.width = '2px';
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}
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row.querySelector('.djDebugLineChart').style.left = getLeft(stat) + '%';
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document.querySelector('#djDebugBrowserTimingTableBody').appendChild(row);
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}
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// This is a reasonably complete and ordered set of timing periods (2 params) and events (1 param)
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addRow('domainLookupStart', 'domainLookupEnd');
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addRow('connectStart', 'connectEnd');
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addRow('requestStart', 'responseEnd'); // There is no requestEnd
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addRow('responseStart', 'responseEnd');
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addRow('domLoading', 'domComplete'); // Spans the events below
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addRow('domInteractive');
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addRow('domContentLoadedEventStart', 'domContentLoadedEventEnd');
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addRow('loadEventStart', 'loadEventEnd');
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document.querySelector('#djDebugBrowserTiming').classList.remove('djdt-hidden');
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})();
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