I was watching the Zen Of Akka by Konrad Malawski, when he came across an interesting tidbit.

When writting out to log files, use the {} formatting options rather than string interpolation. If you're doing debug logging, and it's turned off: No formating is done. With String interpolation, the string is formated prior to executing the method.

That was something that I never really thought about, but he’s right!