An interview with the authors can be found here:
https://www.infoq.com/articles/book-review-optimizing-java
Quoting:
"Key Takeaways
Performance tuning in Java is an experimental science.
There are no magic “go faster” command-line switches for the JVM.
There are no “tips and tricks” to make Java run faster.
The execution speed of Java code is highly dynamic and fundamentally depends on the underlying JVM.
The behavior of JIT-compiled code is significantly more important than the interpreter itself.
This book offers both theory and practice on how to performance tune in Java.
This is a comprehensive book that represents a tutorial for beginners and a reference for experienced Java performance tuning practitioners."
See also: JITwatch
