From 8c6d147e6ae40a1f92aba1aedc0d95ef437dd4ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= <biwanczuk@gmail.com>
Date: Mon, 15 Feb 2021 14:48:47 +0100
Subject: chore: Reorganise workers tests (#9493)

---
 cli/tests/workers/bench_startup.ts | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 cli/tests/workers/bench_startup.ts

(limited to 'cli/tests/workers/bench_startup.ts')

diff --git a/cli/tests/workers/bench_startup.ts b/cli/tests/workers/bench_startup.ts
new file mode 100644
index 000000000..5fbf23b45
--- /dev/null
+++ b/cli/tests/workers/bench_startup.ts
@@ -0,0 +1,33 @@
+// 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 (let i = 1; i <= workerCount; ++i) {
+    const worker = new Worker(
+      new URL("bench_worker.ts", import.meta.url).href,
+      { type: "module" },
+    );
+    const promise = new Promise<void>((resolve): void => {
+      worker.onmessage = (e): void => {
+        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) {
+    const promise = new Promise<void>((resolve): void => {
+      worker.onmessage = (e): void => {
+        if (e.data.cmdId === 3) resolve();
+      };
+    });
+    worker.postMessage({ action: 3 });
+    await promise;
+  }
+  console.log("Finished!");
+}
+
+bench();
-- 
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