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benchmark/worker/atomics-wait.js

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+'use strict';
+
+if (typeof SharedArrayBuffer === 'undefined') {
+  throw new Error('SharedArrayBuffers must be enabled to run this benchmark');
+}
+
+const common = require('../common.js');
+const bench = common.createBenchmark(main, {
+  n: [1e7],
+});
+
+function main({ n }) {
+  const i32arr = new Int32Array(new SharedArrayBuffer(4));
+  bench.start();
+  for (let i = 0; i < n; i++)
+    Atomics.wait(i32arr, 0, 1);  // Will return immediately.
+  bench.end(n);
+}

benchmark/worker/bench-eventlooputil.js

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+'use strict';
+
+const common = require('../common.js');
+const { Worker, parentPort } = require('worker_threads');
+
+if (process.argv[2] === 'idle cats') {
+  return parentPort.once('message', () => {});
+}
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  method: [
+    'ELU_simple',
+    'ELU_passed',
+  ],
+});
+
+function main({ method, n }) {
+  switch (method) {
+    case 'ELU_simple':
+      benchELUSimple(n);
+      break;
+    case 'ELU_passed':
+      benchELUPassed(n);
+      break;
+    default:
+      throw new Error(`Unsupported method ${method}`);
+  }
+}
+
+function benchELUSimple(n) {
+  const worker = new Worker(__filename, { argv: ['idle cats'] });
+
+  spinUntilIdle(worker, () => {
+    bench.start();
+    for (let i = 0; i < n; i++)
+      worker.performance.eventLoopUtilization();
+    bench.end(n);
+    worker.postMessage('bye');
+  });
+}
+
+function benchELUPassed(n) {
+  const worker = new Worker(__filename, { argv: ['idle cats'] });
+
+  spinUntilIdle(worker, () => {
+    let elu = worker.performance.eventLoopUtilization();
+    bench.start();
+    for (let i = 0; i < n; i++)
+      elu = worker.performance.eventLoopUtilization(elu);
+    bench.end(n);
+    worker.postMessage('bye');
+  });
+}
+
+function spinUntilIdle(w, cb) {
+  const t = w.performance.eventLoopUtilization();
+  if (t.idle + t.active > 0)
+    return process.nextTick(cb);
+  setTimeout(() => spinUntilIdle(w, cb), 1);
+}

benchmark/worker/echo.js

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+'use strict';
+
+const common = require('../common.js');
+const { Worker } = require('worker_threads');
+const path = require('path');
+const bench = common.createBenchmark(main, {
+  workers: [1],
+  payload: ['string', 'object'],
+  sendsPerBroadcast: [1, 10],
+  n: [1e5],
+});
+
+const workerPath = path.resolve(__dirname, '..', 'fixtures', 'echo.worker.js');
+
+function main({ n, workers, sendsPerBroadcast: sends, payload: payloadType }) {
+  const expectedPerBroadcast = sends * workers;
+  let payload;
+  let readies = 0;
+  let broadcasts = 0;
+  let msgCount = 0;
+
+  switch (payloadType) {
+    case 'string':
+      payload = 'hello world!';
+      break;
+    case 'object':
+      payload = { action: 'pewpewpew', powerLevel: 9001 };
+      break;
+    default:
+      throw new Error('Unsupported payload type');
+  }
+
+  const workerObjs = [];
+
+  for (let i = 0; i < workers; ++i) {
+    const worker = new Worker(workerPath);
+    workerObjs.push(worker);
+    worker.on('online', onOnline);
+    worker.on('message', onMessage);
+  }
+
+  function onOnline() {
+    if (++readies === workers) {
+      bench.start();
+      broadcast();
+    }
+  }
+
+  function broadcast() {
+    if (broadcasts++ === n) {
+      bench.end(n);
+      for (const worker of workerObjs) {
+        worker.unref();
+      }
+      return;
+    }
+    for (const worker of workerObjs) {
+      for (let i = 0; i < sends; ++i)
+        worker.postMessage(payload);
+    }
+  }
+
+  function onMessage() {
+    if (++msgCount === expectedPerBroadcast) {
+      msgCount = 0;
+      broadcast();
+    }
+  }
+}

benchmark/worker/messageport.js

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+'use strict';
+
+const common = require('../common.js');
+const { MessageChannel } = require('worker_threads');
+const bench = common.createBenchmark(main, {
+  payload: ['string', 'object'],
+  style: ['eventtarget', 'eventemitter'],
+  n: [1e6],
+});
+
+function main(conf) {
+  const n = conf.n;
+  let payload;
+
+  switch (conf.payload) {
+    case 'string':
+      payload = 'hello world!';
+      break;
+    case 'object':
+      payload = { action: 'pewpewpew', powerLevel: 9001 };
+      break;
+    default:
+      throw new Error('Unsupported payload type');
+  }
+
+  const { port1, port2 } = new MessageChannel();
+
+  let messages = 0;
+  function listener() {
+    if (messages++ === n) {
+      bench.end(n);
+      port1.close();
+    } else {
+      write();
+    }
+  }
+
+  switch (conf.style) {
+    case 'eventtarget':
+      port2.onmessage = listener;
+      break;
+    case 'eventemitter':
+      port2.on('message', listener);
+      break;
+    default:
+      throw new Error('Unsupported listener type');
+  }
+
+  bench.start();
+  write();
+
+  function write() {
+    port1.postMessage(payload);
+  }
+}