3 files changed, 108 insertions, 0 deletions
diff --git a/bench/snippets/bun.lockb b/bench/snippets/bun.lockb
new file mode 100755
index 000000000..3acb6d075
--- /dev/null
+++ b/bench/snippets/bun.lockb
diff --git a/bench/snippets/emitter.mjs b/bench/snippets/emitter.mjs
new file mode 100644
index 000000000..f708cf77a
--- /dev/null
+++ b/bench/snippets/emitter.mjs
@@ -0,0 +1,101 @@
+// **so this file can run in node**
+import { createRequire } from "node:module";
+const require = createRequire(import.meta.url);
+// --
+
+const EventEmitterNative = require("node:events").EventEmitter;
+const TypedEmitter = require("tiny-typed-emitter").TypedEmitter;
+const EventEmitter3 = require("eventemitter3").EventEmitter;
+import { bench, run } from "../../node_modules/mitata/src/cli.mjs";
+const event = new Event("hello");
+var id = 0;
+for (let [EventEmitter, className] of [
+  [EventEmitterNative, "EventEmitter"],
+  [TypedEmitter, "TypedEmitter"],
+  [EventEmitter3, "EventEmitter3"],
+]) {
+  const emitter = new EventEmitter();
+
+  emitter.on("hello", event => {
+    event.preventDefault();
+  });
+
+  bench(`${className}.emit`, () => {
+    emitter.emit("hello", {
+      preventDefault() {
+        id++;
+      },
+    });
+  });
+
+  bench(`${className}.on x 10_000 (handler)`, () => {
+    var cb = event => {
+      event.preventDefault();
+    };
+    emitter.on("hey", cb);
+    var called = false;
+    for (let i = 0; i < 10_000; i++)
+      emitter.emit("hey", {
+        preventDefault() {
+          id++;
+          called = true;
+        },
+      });
+    emitter.off("hey", cb);
+
+    if (!called) throw new Error("not called");
+  });
+
+  if (EventEmitter !== EventEmitter3) {
+    var monkey = Object.assign({}, EventEmitter.prototype);
+    monkey.on("hello", event => {
+      event.preventDefault();
+    });
+
+    bench(`[monkey] ${className}.emit`, () => {
+      var called = false;
+      monkey.emit("hello", {
+        preventDefault() {
+          id++;
+          called = true;
+        },
+      });
+
+      if (!called) {
+        throw new Error("monkey failed");
+      }
+    });
+
+    bench(`[monkey] ${className}.on x 10_000 (handler)`, () => {
+      var cb = () => {
+        event.preventDefault();
+      };
+      monkey.on("hey", cb);
+      for (let i = 0; i < 10_000; i++)
+        monkey.emit("hey", {
+          preventDefault() {
+            id++;
+          },
+        });
+      monkey.off("hey", cb);
+    });
+  }
+}
+
+var target = new EventTarget();
+target.addEventListener("hello", event => {});
+bench("EventTarget.dispatch", () => {
+  target.dispatchEvent(event);
+});
+
+var hey = new Event("hey");
+
+bench("EventTarget.on x 10_000 (handler)", () => {
+  var handler = event => {};
+  target.addEventListener("hey", handler);
+
+  for (let i = 0; i < 10_000; i++) target.dispatchEvent(hey);
+  target.removeEventListener("hey", handler);
+});
+
+await run();
diff --git a/bench/snippets/package.json b/bench/snippets/package.json
new file mode 100644
index 000000000..6244001a8
--- /dev/null
+++ b/bench/snippets/package.json
@@ -0,0 +1,7 @@
+{
+  "dependencies": {
+    "eventemitter3": "^5.0.0",
+    "tiny-typed-emitter": "latest"
+  },
+  "prettier": "../../.prettierrc.cjs"
+}