log4j performance

Question

I\'m developing a web app, and I\'d like to log some information to help me improve and observe the app. (I\'m using Tomcat6)

First I thought I would use StringBuild

Answer 1

I don't have to worry about log4j's performance even if I heavily log

Exactly. Do not optimize until your profiling results tell you to. There are cases, when logging performance is a bottleneck, but you need first to hit that case, then optimize for it.