97 lines
3.4 KiB
HTML
97 lines
3.4 KiB
HTML
<!doctype html>
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<head>
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<meta charset="utf-8">
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<title>Acorn benchmark</title>
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<script src="../acorn.js"></script>
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<script src="compare/esprima.js"></script>
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<script src="compare/traceur.js"></script>
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<script src="jquery-string.js"></script>
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<script src="codemirror-string.js"></script>
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<style>
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td { text-align: right; padding-right: 20px; }
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th { text-align: left; padding-right: 40px; }
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body { max-width: 50em; padding: 1em 2em; }
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h1 { font-size: 150%; }
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</style>
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</head>
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<h1>Acorn/Esprima/Traceur speed comparison</h1>
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<p>This will run each of the three ES6 parsers on the source code of
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jQuery 1.11.1 and CodeMirror 3.0b1 for five seconds, and show a table
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indicating the number of lines parsed per second. Note that Traceur
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always stores location data, and is thus not fairly compared by the
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benchmark <em>without</em> location data.<p>
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<p>Also note that having the developer tools open in Chrome, or
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Firebug in Firefox <em>heavily</em> influences the numbers you get. In
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Chrome, the effect even lingers (in the tab) after you close the
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developer tools. Load in a fresh tab to get (halfway) stable
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numbers.</p>
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<button onclick="run(false)">Compare <strong>without</strong> location data</button>
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<button onclick="run(true)">Compare <strong>with</strong> location data</button>
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<button onclick="run(false, true)">Run only Acorn</button>
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<span id="running"></span>
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<script>
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var sourceFileName = 'source.js';
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function runAcorn(code, locations) {
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acorn.parse(code, {ecmaVersion: 6, locations: locations, sourceFile: sourceFileName});
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}
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function runEsprima(code, locations) {
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esprima.parse(code, {loc: locations, source: sourceFileName});
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}
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function runTraceur(code) {
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var file = new traceur.syntax.SourceFile(sourceFileName, code);
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var parser = new traceur.syntax.Parser(file);
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parser.parseScript();
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}
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var totalLines = codemirror30.split("\n").length + jquery111.split("\n").length;
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var nowHost = (typeof performance === 'object' && 'now' in performance) ? performance : Date;
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function benchmark(runner, locations) {
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// Give it a chance to warm up (first runs are usually outliers)
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runner(jquery111, locations);
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runner(codemirror30, locations);
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var t0 = nowHost.now(), t1, lines = 0;
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for (;;) {
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runner(jquery111, locations);
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runner(codemirror30, locations);
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lines += totalLines;
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t1 = nowHost.now();
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if (t1 - t0 > 5000) break;
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}
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return lines / ((t1 - t0) / 1000);
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}
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function showOutput(values) {
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var html = "<hr><table>";
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for (var i = 0; i < values.length; ++i)
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html += "<tr><th>" + values[i].name + "</td><td>" + Math.round(values[i].score) + " lines per second</td><td>" +
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Math.round(values[i].score * 100 / values[0].score) + "%</td></tr>";
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document.body.appendChild(document.createElement("div")).innerHTML = html;
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}
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function run(locations, acornOnly) {
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var running = document.getElementById("running");
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running.innerHTML = "Running benchmark...";
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var data = [{name: "Acorn", runner: runAcorn},
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{name: "Esprima", runner: runEsprima},
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{name: "Traceur", runner: runTraceur}];
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if (acornOnly) data.length = 1;
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var pos = 0;
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function next() {
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data[pos].score = benchmark(data[pos].runner, locations);
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if (++pos == data.length) {
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running.innerHTML = "";
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showOutput(data);
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} else setTimeout(next, 100);
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}
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setTimeout(next, 50);
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}
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</script>
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