Obsolete Java Optimization Tips

Question

There are number of performance tips made obsolete by Java compiler and especially Profile-guided optimization. For example, these platform-provided optimizations can drasti

Answer 1

1. "Premature optimization is the root of all evil"(Donald Knuth)
2. It is useful to optimize only the bottlenecks.
3. You should analyze the code in each situation. Maybe you can replace the TreeSet by a fast HashSet because you don't need the sorting feature or maybe you can use float instead of double( look at the Android SDK).
4. If no technique helps you can try to rewrite a piece of code and call it via JNI, so that native code is working.