initial

node_modules/onoff/test/performance-sync.js

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+"use strict";
+
+const Gpio = require('../onoff').Gpio;
+
+const pulseLed = (led, pulseCount) => {
+  let time = process.hrtime();
+
+  for (let i = 0; i !== pulseCount; i += 1) {
+    led.writeSync(1);
+    led.writeSync(0);
+  }
+
+  time = process.hrtime(time);
+
+  const writesPerSecond = pulseCount * 2 / (time[0] + time[1] / 1E9);
+
+  return writesPerSecond;
+}
+
+const syncWritesPerSecond = () => {
+  const led = new Gpio(17, 'out');
+  let writes = 0;
+
+  // Do a dry run first to get the runtime primed
+  pulseLed(led, 50000);
+
+  for (let i = 0; i !== 10; i += 1) {
+    writes += pulseLed(led, 100000);
+  }
+
+  led.unexport();
+
+  return writes / 10;
+}
+
+console.log('ok - ' + __filename);
+console.log(
+  '     ' + Math.floor(syncWritesPerSecond()) + ' sync writes per second'
+);
+