What’s the cost of trace/debug logging in production? What’s the performance cost of logging to a file? In these benchmarks, I compare the performance impact of logging levels (error, warn, info, debug, trace) and logging appenders (console appender, file appender) on several realistic OptaPlanner use cases.

Benchmark methodology

Logging implementation: SFL4J 1.7.2 with Logback 1.0.9...