Is high memory usage after stress test normal?

[kamdubiel]

I initialized new Next project and added a dynamic route with async server component, which is fetching data from the API with no-cache. The code is very simple, and I'm using fresh local Express API to just send example data:

export default async function Page() {
  const response = await fetch(URL, {
    headers: { Accept: "application/json" },
    cache: "no-store",
  });

  const data = await response.json();

  console.log("Data: ", data);

  return <div>PAGE</div>;
}

After starting the Docker container the memory usage is just around 45MB, but after doing 10k requests with K6, the memory stays at ~400MB and never goes down. In real world app, this leads to out of memory errors. Everything's working correctly with axios and cross-fetch, so for me it looks like garbage collector is not able to cleanup fetch cache. Also, I tried multiple different Next canary, and NodeJS versions - they did not fix the issue.

I also prepared example reproduction here:
https://github.com/kamdubiel/next-fetch

I saw multiple reported issues about memory leaks, but mine is much simpler, so I don't want to create another issue yet. Does anybody have similar issues?