sometimes you need mechanism sympathy instead of relying on tools so much If you need mechanical sympathy throughout you still need solid measurements, you sti

sometimes you need mechanism sympathy instead of relying on tools so much If you need mechanical sympathy throughout you still need solid measurements, you still need to know when you fall off performance cliffs, but you should be experienced enough not to be misled by articles like this one. That last bit was my biggest concern. Because very very few Java apps have performance bottlenecks throughout. That's more typically seen in game engines, where the whole app is a hot loop, and they're not often written in Java. As to whether it works or not: I've seen it work repeatedly for scanning and parsing. I don't know your situation and can't say why it hasn't worked for you. But again, measurement is the most important bit, and you still need to notice the cliff dropping.