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benchmark/perf_hooks/bench-eventlooputil.js

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+'use strict';
+
+const common = require('../common.js');
+const assert = require('assert').ok;
+const { performance } = require('perf_hooks');
+const { nodeTiming, eventLoopUtilization } = performance;
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  method: [
+    'idleTime',
+    'ELU_simple',
+    'ELU_passed',
+  ],
+});
+
+function main({ method, n }) {
+  switch (method) {
+    case 'idleTime':
+      benchIdleTime(n);
+      break;
+    case 'ELU_simple':
+      benchELUSimple(n);
+      break;
+    case 'ELU_passed':
+      benchELUPassed(n);
+      break;
+    default:
+      throw new Error(`Unsupported method ${method}`);
+  }
+}
+
+function benchIdleTime(n) {
+  bench.start();
+  for (let i = 0; i < n; i++)
+    nodeTiming.idleTime; // eslint-disable-line no-unused-expressions
+  bench.end(n);
+}
+
+function benchELUSimple(n) {
+  // Need to put this in setImmediate or will always return 0.
+  setImmediate(() => {
+    const elu = eventLoopUtilization();
+    assert(elu.active + elu.idle > 0);
+
+    bench.start();
+    for (let i = 0; i < n; i++)
+      eventLoopUtilization();
+    bench.end(n);
+  });
+}
+
+function benchELUPassed(n) {
+  // Need to put this in setImmediate or will always return 0.
+  setImmediate(() => {
+    let elu = eventLoopUtilization();
+    assert(elu.active + elu.idle > 0);
+
+    bench.start();
+    for (let i = 0; i < n; i++)
+      elu = eventLoopUtilization(elu);
+    bench.end(n);
+  });
+}

benchmark/perf_hooks/histogram-clone.js

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+'use strict';
+
+const assert = require('assert');
+const common = require('../common.js');
+
+const { createHistogram } = require('perf_hooks');
+
+const bench = common.createBenchmark(main, {
+  n: [1e5],
+});
+
+let _histogram;
+
+function main({ n }) {
+  const histogram = createHistogram();
+
+  bench.start();
+  for (let i = 0; i < n; i++)
+    _histogram = structuredClone(histogram);
+  bench.end(n);
+
+  // Avoid V8 deadcode (elimination)
+  assert.ok(_histogram);
+}

benchmark/perf_hooks/histogram-create.js

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+'use strict';
+
+const assert = require('assert');
+const common = require('../common.js');
+
+const { createHistogram } = require('perf_hooks');
+
+const bench = common.createBenchmark(main, {
+  n: [1e5],
+});
+
+let _histogram;
+
+function main({ n }) {
+  bench.start();
+  for (let i = 0; i < n; i++)
+    _histogram = createHistogram();
+  bench.end(n);
+
+  // Avoid V8 deadcode (elimination)
+  assert.ok(_histogram);
+}

benchmark/perf_hooks/histogram-record.js

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+'use strict';
+
+const assert = require('assert');
+const common = require('../common.js');
+
+const { createHistogram } = require('perf_hooks');
+
+const bench = common.createBenchmark(main, {
+  n: [1e5],
+});
+
+function main({ n }) {
+  const histogram = createHistogram();
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    histogram.record(i + 1);
+    /* eslint-disable no-unused-expressions */
+    histogram.max;
+    histogram.mean;
+    /* eslint-enable no-unused-expressions */
+  }
+  bench.end(n);
+
+  // Avoid V8 deadcode (elimination)
+  assert.ok(histogram);
+}

benchmark/perf_hooks/nodetiming-uvmetricsinfo.js

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+'use strict';
+
+const common = require('../common.js');
+const assert = require('node:assert');
+const fs = require('node:fs/promises');
+
+const {
+  performance,
+} = require('perf_hooks');
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  events: [1, 1000, 10000],
+});
+
+async function runEvents(events) {
+  for (let i = 0; i < events; ++i) {
+    assert.ok(await fs.statfs(__filename));
+  }
+}
+
+async function main({ n, events }) {
+  await runEvents(events);
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    assert.ok(performance.nodeTiming.uvMetricsInfo);
+  }
+  bench.end(n);
+}

benchmark/perf_hooks/now.js

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+'use strict';
+
+const assert = require('assert');
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+});
+
+function main({ n }) {
+  const arr = [];
+  for (let i = 0; i < n; ++i) {
+    arr.push(performance.now());
+  }
+
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    arr[i] = performance.now();
+  }
+  bench.end(n);
+
+  assert.strictEqual(arr.length, n);
+}

benchmark/perf_hooks/performance-observer.js

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+'use strict';
+
+const assert = require('assert');
+const common = require('../common.js');
+
+const {
+  PerformanceObserver,
+  performance,
+} = require('perf_hooks');
+
+function randomFn() {
+  return Math.random();
+}
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  pending: [1, 10],
+}, {
+  options: ['--expose-internals'],
+});
+
+let _result;
+
+function fillQueue(timerfied, pending) {
+  for (let i = 0; i < pending; i++) {
+    _result = timerfied();
+  }
+  // Avoid V8 deadcode (elimination)
+  assert.ok(_result);
+}
+
+function main({ n, pending }) {
+  const timerfied = performance.timerify(randomFn);
+
+  let count = 0;
+  const obs = new PerformanceObserver((entries) => {
+    count += entries.getEntries().length;
+
+    if (count >= n) {
+      bench.end(count);
+    } else {
+      fillQueue(timerfied, pending);
+    }
+  });
+  obs.observe({ entryTypes: ['function'], buffered: true });
+
+  bench.start();
+  fillQueue(timerfied, pending);
+}

benchmark/perf_hooks/resourcetiming.js

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+'use strict';
+
+const common = require('../common.js');
+
+const {
+  PerformanceObserver,
+  performance,
+} = require('perf_hooks');
+
+function createTimingInfo({
+  startTime = 0,
+  redirectStartTime = 0,
+  redirectEndTime = 0,
+  postRedirectStartTime = 0,
+  finalServiceWorkerStartTime = 0,
+  finalNetworkRequestStartTime = 0,
+  finalNetworkResponseStartTime = 0,
+  endTime = 0,
+  encodedBodySize = 0,
+  decodedBodySize = 0,
+  finalConnectionTimingInfo = null,
+}) {
+  if (finalConnectionTimingInfo !== null) {
+    finalConnectionTimingInfo.domainLookupStartTime ||= 0;
+    finalConnectionTimingInfo.domainLookupEndTime ||= 0;
+    finalConnectionTimingInfo.connectionStartTime ||= 0;
+    finalConnectionTimingInfo.connectionEndTime ||= 0;
+    finalConnectionTimingInfo.secureConnectionStartTime ||= 0;
+    finalConnectionTimingInfo.ALPNNegotiatedProtocol ||= [];
+  }
+  return {
+    startTime,
+    redirectStartTime,
+    redirectEndTime,
+    postRedirectStartTime,
+    finalServiceWorkerStartTime,
+    finalNetworkRequestStartTime,
+    finalNetworkResponseStartTime,
+    endTime,
+    encodedBodySize,
+    decodedBodySize,
+    finalConnectionTimingInfo,
+  };
+}
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  observe: ['resource'],
+});
+
+function test() {
+  const timingInfo = createTimingInfo({ finalConnectionTimingInfo: {} });
+  performance.markResourceTiming(
+    timingInfo,
+    'http://localhost:8080',
+    'fetch',
+    {},
+    '',
+  );
+}
+
+function main({ n, observe }) {
+  const obs = new PerformanceObserver(() => {
+    bench.end(n);
+  });
+  obs.observe({ entryTypes: [observe], buffered: true });
+
+  bench.start();
+  for (let i = 0; i < n; i++)
+    test();
+}

benchmark/perf_hooks/time-origin.js

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+'use strict';
+
+const assert = require('assert');
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  method: ['timeOrigin', 'toJSON'],
+});
+
+function main({ method, n }) {
+  switch (method) {
+    case 'timeOrigin':
+      benchTimeOrigin(n);
+      break;
+    case 'toJSON':
+      benchToJSON(n);
+      break;
+    default:
+      throw new Error(`Unsupported method ${method}`);
+  }
+}
+
+function benchTimeOrigin(n) {
+  const arr = [];
+  for (let i = 0; i < n; ++i) {
+    arr.push(performance.timeOrigin);
+  }
+
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    arr[i] = performance.timeOrigin;
+  }
+  bench.end(n);
+
+  assert.strictEqual(arr.length, n);
+}
+
+function benchToJSON(n) {
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    performance.toJSON();
+  }
+  bench.end(n);
+}

benchmark/perf_hooks/timerfied.js

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+'use strict';
+
+const assert = require('assert');
+const common = require('../common.js');
+
+const {
+  PerformanceObserver,
+  performance,
+} = require('perf_hooks');
+
+function randomFn() {
+  return Math.random();
+}
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  observe: ['function'],
+});
+
+let _result;
+
+function main({ n, observe }) {
+  const obs = new PerformanceObserver(() => {
+    bench.end(n);
+  });
+  obs.observe({ entryTypes: [observe], buffered: true });
+
+  const timerfied = performance.timerify(randomFn);
+
+  bench.start();
+  for (let i = 0; i < n; i++)
+    _result = timerfied();
+
+  // Avoid V8 deadcode (elimination)
+  assert.ok(_result);
+}

benchmark/perf_hooks/usertiming.js

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+'use strict';
+
+const common = require('../common.js');
+
+const {
+  PerformanceObserver,
+  performance,
+} = require('perf_hooks');
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  observe: ['all', 'measure'],
+});
+
+function test() {
+  performance.mark('a');
+  performance.mark('b');
+  performance.measure('a to b', 'a', 'b');
+}
+
+function main({ n, observe }) {
+  const entryTypes = observe === 'all' ?
+    [ 'mark', 'measure' ] :
+    [ observe ];
+  const obs = new PerformanceObserver(() => {
+    bench.end(n);
+  });
+  obs.observe({ entryTypes, buffered: true });
+
+  bench.start();
+  performance.mark('start');
+  for (let i = 0; i < 1e5; i++)
+    test();
+}