[ FEATURE REQUEST]: Non-blocking logging

Plugin

Logger

I have an idea!

Currently, logging is blocking.

You can see this in action by running roadrunner through pv:

./rr serve 2> >(pv -q -L 1k)

This will result in a slowdown of roadrunner, including startup and a slowdown of it being able to process requests, tasks or workflows. (You can increase or decrease the throttling to see its effects by tweaking the -L parameter). The effect is higher with higher levels of logging, e.g. debug-level.

In my case, I'm running the roadrunner process from another host process, and processing its logs sent to stderr to enrich it. Poor processing performance on my part meant I was filling the pipe and blocking roadrunner.