Writing software is regarded by many developers as a craft or an art. However when it comes to performance tuning and/or testing many believe it to be more of a dark art. Nothing farther from the truth. We can gain a lot by applying a concrete methodology and similar reasoning techniques we follow when writing production code. There are tools in the Java space that can help us get better measurements and results, JMeter perhaps one of the most well known, JMH is probably the next likely candidate. We'll discuss these tools and some techniques that should make engaging in performance testing a rewarding experience.