cc @nodejs/diagnostics @anonrig

setTimeout should probably actually just clear immediately after running given that it only occurs once. But yes, also clearing in clearInterval makes sense to me too.

I guess this is not only relevant for timers and intervals, all resources are effected.

const { AsyncLocalStorage, AsyncResource } = require('node:async_hooks');
const als = new AsyncLocalStorage();
let r, p;
als.run("I consume a lot memory", () => {
  r = new AsyncResource("aResource", { requireManualDestroy: true })
  r.emitDestroy()
  p = Promise.resolve()
})
console.log(r, p);

 AsyncResource {
  [Symbol(async_id_symbol)]: 2,
  [Symbol(trigger_async_id_symbol)]: 1,
  [Symbol(kResourceStore)]: 'I consume a lot memory'
} Promise {
  undefined,
  [Symbol(async_id_symbol)]: 3,
  [Symbol(trigger_async_id_symbol)]: 1,
  [Symbol(kResourceStore)]: 'I consume a lot memory'
}

For timers/intervals it's likely easier to find the place to cleanup.
Maybe we can extend the cleanup to some more places?

Absolutely!