tsx doesn't stop spawning threads with node 20

[samuelgozi]

Bug description

Whether I run tsx ./main.ts or node --loader tsx main.ts, the code runs, but threads don't stop spawning until OS kills the process.

It doesn't matter which code I run as long as it stays up.
This doesn't seem to happen with node 19.

Reproduction

setInterval(() => {
  process.stderr.write(`\r${performance.now()}`);
}, 1000);

Environment

System:
    OS: macOS 13.3
    CPU: (8) arm64 Apple M1 Pro
    Memory: 3.12 GB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.0.0 - /opt/homebrew/bin/node
    npm: 9.6.4 - /opt/homebrew/bin/npm
  npmPackages:
    tsx: ^3.8.0 => 3.12.3

Can you work on a fix?

• I’m interested in opening a pull request to address this issue.

[LangLangBart]

• duplicate of Memory leak on Node v20 #229 ?

[privatenumber]

Yes, seems like it.

Also:

• Using custom loaders results in a load loop / OOM nodejs/node#47566
• And maybe v20.0.0 Unlimited increase in memory nodejs/node#47761

Closing as it's a Node.js bug.