2018-01-15 15:24:18 +00:00
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<!DOCTYPE html>
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<!-- Copyright 2018 the V8 project authors. All rights reserved.
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Use of this source code is governed by a BSD-style license that can be
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found in the LICENSE file. -->
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<html lang="en">
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<head>
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2022-08-22 12:37:00 +00:00
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<!-- This will be overwritten by the v8.dev/tools exporter -->
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<!-- ANALYTICS_PLACEHOLDER -->
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2018-01-15 15:24:18 +00:00
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<meta charset="UTF-8">
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<title>V8 Heap Statistics</title>
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2018-02-14 08:26:42 +00:00
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<link href='https://fonts.googleapis.com/css?family=Roboto' rel='stylesheet'>
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<script
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2018-01-23 14:48:08 +00:00
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2018-02-14 08:26:42 +00:00
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<script
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2018-01-23 14:48:08 +00:00
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src="https://cdnjs.cloudflare.com/ajax/libs/pako/1.0.6/pako_inflate.min.js"
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integrity="sha256-N1z6ddQzX83fjw8v7uSNe7/MgOmMKdwFUv1+AJMDqNM="
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crossorigin="anonymous"></script>
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2018-01-15 15:24:18 +00:00
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2020-03-27 10:02:24 +00:00
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<script src="https://cdnjs.cloudflare.com/ajax/libs/oboe.js/2.1.5/oboe-browser.min.js"
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crossorigin="anonymous"></script>
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2018-03-05 16:55:18 +00:00
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<script src="helper.js"></script>
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2020-03-23 20:08:31 +00:00
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<script type="module" src="details-selection.js"></script>
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<script type="module" src="global-timeline.js"></script>
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<script type="module" src="histogram-viewer.js"></script>
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<script type="module" src="trace-file-reader.js"></script>
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2018-01-15 15:24:18 +00:00
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2018-02-14 08:26:42 +00:00
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<style>
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2018-01-15 15:24:18 +00:00
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body {
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font-family: 'Roboto', sans-serif;
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margin-left: 5%;
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margin-right: 5%;
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}
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</style>
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2018-02-14 08:26:42 +00:00
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<script>
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2018-01-15 15:24:18 +00:00
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'use strict';
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2018-01-18 11:12:13 +00:00
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google.charts.load('current', {'packages':['line', 'corechart', 'bar']});
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2018-01-15 15:24:18 +00:00
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function $(id) { return document.querySelector(id); }
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while (node.firstChild) {
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node.removeChild(node.firstChild);
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}
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}
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let state = Object.create(null);
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function globalDataChanged(e) {
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state.data = e.detail;
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// Emit one entry with the whole model for debugging purposes.
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console.log(state.data);
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state.selection = null;
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$('#global-timeline').selection = state.selection;
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$('#global-timeline').data = state.data;
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2018-01-18 11:12:13 +00:00
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$('#histogram-viewer').selection = state.selection;
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$('#histogram-viewer').data = state.data;
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$('#details-selection').data = state.data;
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}
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function globalSelectionChangedA(e) {
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state.selection = e.detail;
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console.log(state.selection);
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2018-01-15 15:24:18 +00:00
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$('#global-timeline').selection = state.selection;
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2018-01-18 11:12:13 +00:00
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$('#histogram-viewer').selection = state.selection;
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2018-01-15 15:24:18 +00:00
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}
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</script>
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</head>
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<body>
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2018-03-02 10:51:03 +00:00
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<h1>V8 Heap Statistics</h1>
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2018-01-15 15:24:18 +00:00
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<trace-file-reader onchange="globalDataChanged(event)"></trace-file-reader>
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2018-02-14 08:26:42 +00:00
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<details-selection id="details-selection" onchange="globalSelectionChangedA(event)"></details-selection>
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<global-timeline id="global-timeline"></global-timeline>
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<histogram-viewer id="histogram-viewer"></histogram-viewer>
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2018-01-16 13:14:26 +00:00
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<p>Visualize object statistics that have been gathered using</p>
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<ul>
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2022-02-03 15:07:29 +00:00
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<li>Use <code>--trace-gc-object-stats</code> for V8 and load the contents of stdout</li>
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2018-01-16 13:14:26 +00:00
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<li>
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<a
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href="https://www.chromium.org/developers/how-tos/trace-event-profiling-tool">Chrome's
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tracing infrastructure</a> collecting data for the category
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2022-02-03 15:07:29 +00:00
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<code>disabled-by-default-v8.gc_stats</code> and directly load the
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results.html or trace.json.gzip file.
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2018-01-16 13:14:26 +00:00
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</li>
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</ul>
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2022-02-03 15:07:29 +00:00
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Additional information:
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<ul>
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<li>
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You only get a data point on major GCs. You can enforce this by
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using the <code>--gc-global</code> V8 flag.
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</li>
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<li>
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For more frequent data points you can also the
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<code>--gc-interval=$AFTER_N_ALLOCATIONS</code> V8.
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</li>
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<li>
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The visualizer needs to run on a web server due to HTML imports
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requiring <a
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href="https://en.wikipedia.org/wiki/Cross-origin_resource_sharing">CORS</a>.
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</li>
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<ul>
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2018-01-15 15:24:18 +00:00
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</body>
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</html>
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