Performance Testing Isn’t Just for Enterprise

Free tools like k6 and Locust are all you need to catch memory leaks

You don’t need an enterprise budget to run performance tests.

Let me say that again.

You don’t need a dedicated performance team. You don’t need expensive SaaS tools. You don’t need a 200-server load generator.

Here’s what you actually need: a free tool, one endpoint, fifty virtual users, and five minutes.

That’s it.

I’ve caught memory leaks on production APIs with exactly this setup. The tool runs. It hits one endpoint with fifty simulated users for five minutes. Memory usage climbs instead of stabilizing. That’s the leak.

You don’t need to simulate a million users. You just need to see if your app bleeds memory under sustained traffic. Fifty users for five minutes is enough to reveal that.

Try it.

Pick an endpoint. Run k6 or Locust with fifty virtual users for five minutes. Watch your memory metrics. If they keep climbing after the initial warm-up, you found something.

Free tools. Small setup. Big signal.

Who else is running lightweight performance tests on their team?