benchmark: add benchmark for EventTarget add and remove

debadree25 · danielleadams · commit 5f647fb7b431 · 2023-04-10T20:55:01.000-04:00
Refs: nodejs/performance#60 PR-URL: #46779 Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/benchmark/events/eventtarget-add-remove.js b/benchmark/events/eventtarget-add-remove.js
@@ -0,0 +1,26 @@
+'use strict';
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  n: [1e6],
+  nListener: [5, 10],
+});
+
+function main({ n, nListener }) {
+  const target = new EventTarget();
+  const listeners = [];
+  for (let k = 0; k < nListener; k += 1)
+    listeners.push(() => {});
+
+  bench.start();
+  for (let i = 0; i < n; i += 1) {
+    const dummy = (i % 2 === 0) ? 'dummy0' : 'dummy1';
+    for (let k = listeners.length; --k >= 0;) {
+      target.addEventListener(dummy, listeners[k]);
+    }
+    for (let k = listeners.length; --k >= 0;) {
+      target.removeEventListener(dummy, listeners[k]);
+    }
+  }
+  bench.end(n);
+}
