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[benchmarks-js.git] / busy-wait.mjs

diff --git a/busy-wait.mjs b/busy-wait.mjs
new file mode 100644 (file)
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+++ b/busy-wait.mjs
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+import Benchmark from 'benny'
+import { sleep } from './benchmark-utils.js'
+
+const timeout = 2000
+const interval = 1000
+
+/**
+ * @param timeoutMs
+ */
+function dummyTimeoutBusyWait (timeoutMs) {
+  const timeoutTimestampMs = performance.now() + timeoutMs
+  // eslint-disable-next-line no-empty
+  do {} while (performance.now() < timeoutTimestampMs)
+}
+
+/**
+ * @param timeoutMs
+ * @param intervalMs
+ */
+async function sleepTimeoutBusyWait (timeoutMs, intervalMs = interval) {
+  const timeoutTimestampMs = performance.now() + timeoutMs
+  do {
+    await sleep(intervalMs)
+  } while (performance.now() < timeoutTimestampMs)
+}
+
+/**
+ * @param timeoutMs
+ * @param intervalMs
+ */
+async function divideAndConquerTimeoutBusyWait (
+  timeoutMs,
+  intervalMs = interval
+) {
+  const tries = Math.round(timeoutMs / intervalMs)
+  let count = 0
+  do {
+    count++
+    await sleep(intervalMs)
+  } while (count <= tries)
+}
+
+/**
+ * @param timeoutMs
+ * @param intervalMs
+ */
+async function setIntervalTimeoutBusyWait (timeoutMs, intervalMs = interval) {
+  return new Promise(resolve => {
+    const tries = Math.round(timeoutMs / intervalMs)
+    let count = 0
+    const triesSetInterval = setInterval(() => {
+      count++
+      if (count === tries) {
+        clearInterval(triesSetInterval)
+        return resolve()
+      }
+    }, intervalMs)
+  })
+}
+
+Benchmark.suite(
+  'Busy wait',
+  Benchmark.add('dummyTimeoutBusyWait', () => {
+    dummyTimeoutBusyWait(timeout)
+  }),
+  Benchmark.add('sleepTimeoutBusyWait', async () => {
+    await sleepTimeoutBusyWait(timeout)
+  }),
+  Benchmark.add('divideAndConquerTimeoutBusyWait', async () => {
+    await divideAndConquerTimeoutBusyWait(timeout)
+  }),
+  Benchmark.add('setIntervalTimeoutBusyWait', async () => {
+    await setIntervalTimeoutBusyWait(timeout)
+  }),
+  Benchmark.cycle(),
+  Benchmark.complete(),
+  Benchmark.save({ file: 'busy-wait', format: 'json', details: true }),
+  Benchmark.save({ file: 'busy-wait', format: 'chart.html', details: true }),
+  Benchmark.save({ file: 'busy-wait', format: 'table.html', details: true })
+).catch(err => {
+  console.error(err)
+})