71 lines
2.4 KiB
JavaScript
71 lines
2.4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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/* exported timeThis */
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// Load the shared-head file first.
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Services.scriptloader.loadSubScript(
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"chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
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this
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);
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// Load common.js and promisified-events.js from accessible/tests/mochitest/ for
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// all tests.
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loadScripts(
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{ name: "common.js", dir: MOCHITESTS_DIR },
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{ name: "promisified-events.js", dir: MOCHITESTS_DIR }
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);
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// All the A11Y metrics in tools/performance/PerfStats.h.
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const ALL_A11Y_PERFSTATS =
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(1 << 29) |
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(1 << 30) |
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(1 << 31) |
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(1 << 32) |
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(1 << 33) |
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(1 << 34) |
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(1 << 35) |
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(1 << 36) |
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(1 << 37) |
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(1 << 38) |
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(1 << 39) |
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(1 << 40) |
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(1 << 41) |
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(1 << 42) |
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(1 << 43) |
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(1 << 44);
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/**
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* Time a function and log how long it took. The given name is included in log
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* messages. All accessibility PerfStats metrics are also captured and logged.
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*/
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async function timeThis(name, func) {
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const logPrefix = `Timing: ${name}`;
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info(`${logPrefix}: begin`);
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const start = performance.now();
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ChromeUtils.setPerfStatsCollectionMask(ALL_A11Y_PERFSTATS);
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await func();
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const delta = performance.now() - start;
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info(`${logPrefix}: took ${delta} ms`);
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const stats = JSON.parse(await ChromeUtils.collectPerfStats());
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ChromeUtils.setPerfStatsCollectionMask(0);
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// Filter stuff out of stats that we don't care about.
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// Filter out the GPU process, since accessibility doesn't do anything there.
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stats.processes = stats.processes.filter(process => process.type != "gpu");
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for (const process of stats.processes) {
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// Because of weird JS -> WebIDL 64 bit number issues, we get metrics here
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// that aren't for accessibility. For example, 1 << 32 also gets us 1 << 0.
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// Filter those out. Also, filter out any metrics with a count of 0.
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process.perfstats.metrics = process.perfstats.metrics.filter(
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metric => metric.metric.startsWith("A11Y_") && metric.count > 0
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);
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}
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// Now that we've filtered metrics, remove any processes that have no metrics left.
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stats.processes = stats.processes.filter(
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process => !!process.perfstats.metrics.length
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);
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info(`${logPrefix}: PerfStats: ${JSON.stringify(stats, null, 2)}`);
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}
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