Add worker benchmarks (#2059)

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/workers_startup_bench.ts b/tests/workers_startup_bench.ts
new file mode 100644
index 000000000..46b2b2801
--- /dev/null
+++ b/tests/workers_startup_bench.ts
@@ -0,0 +1,25 @@
+// Benchmark measures time it takes to start and stop a number of workers.
+const workerCount = 50;
+
+async function bench(): Promise<void> {
+  const workers: Worker[] = [];
+  for (var i = 1; i <= workerCount; ++i) {
+    const worker = new Worker("tests/subdir/bench_worker.ts");
+    const promise = new Promise(resolve => {
+      worker.onmessage = e => {
+        if (e.data.cmdId === 0) resolve();
+      };
+    });
+    worker.postMessage({ cmdId: 0, action: 2 });
+    await promise;
+    workers.push(worker);
+  }
+  console.log("Done creating workers closing workers!");
+  for (const worker of workers) {
+    worker.postMessage({ action: 3 });
+    await worker.closed; // Required to avoid a cmdId not in table error.
+  }
+  console.log("Finished!");
+}
+
+bench();