[bench] Add a `performance.now` bench

1 files changed, 17 insertions, 0 deletions

diff --git a/bench/performance-now-overhead.js b/bench/performance-now-overhead.js
new file mode 100644
index 000000000..12115f203
--- /dev/null
+++ b/bench/performance-now-overhead.js
@@ -0,0 +1,17 @@
+import { group } from "mitata";
+import { bench, run } from "mitata";
+bench("performance.now x 1000", () => {
+  for (let i = 0; i < 1000; i++) {
+    performance.now();
+  }
+});
+
+if ("Bun" in globalThis) {
+  var nanoseconds = Bun.nanoseconds;
+  bench("Bun.nanoseconds x 1000", () => {
+    for (let i = 0; i < 1000; i++) {
+      nanoseconds();
+    }
+  });
+}
+await run();