Practical Java performance tuning
Learning from Benjamin Evans and James Gough, on java was really good, the video is not open I guess, but can be accessed on O’Reilly platform.
They highlight the fact that performance is never alone, you always learning together. Starting with cache misses, and other basic issues they build upon that.
REFs
[1]https://www.oreilly.com/learning/practical-java-performance-tuning