Java Method invocation vs using a variable

by

Never code for performance, always code for readability. Let the compiler do the work.

They can improve the compiler/runtime to run good code faster and suddenly your “Fast” code is actually slowing the system down.

Java compiler & runtime optimizations seem to address more common/readable code first, so your “Optimized” code is more likely to be de-optimized at a later time than code that was just written cleanly.

Note:

This answer is referring to Java code “Tricks” like the question referenced, not bad programming that might raise the level of loops from an O(N) to an O(N^2). Generally write clean, DRY code and wait for an operation to take noticeably too long before fixing it. You will almost never reach this point unless you are a game designer.

More Related Contents:

  1. When to use StringBuilder in Java [duplicate]
  2. The performance impact of using instanceof in Java
  3. Does setting Java objects to null do anything anymore?
  4. Performance of Java matrix math libraries? [closed]
  5. Fastest way to iterate over all the chars in a String
  6. Should I use Java’s String.format() if performance is important?
  7. How do I speed up the gwt compiler?
  8. Performance of StringTokenizer class vs. String.split method in Java
  9. Is there any performance reason to declare method parameters final in Java?
  10. Any recommended Java profiling tutorial? [closed]
  11. Performance penalty of String.intern()
  12. Garbage collection behaviour for String.intern()
  13. Android – Prevent white screen at startup
  14. Java XPath (Apache JAXP implementation) performance
  15. Which of these pieces of code is faster in Java?
  16. Most efficient way of converting String to Integer in java
  17. Should try…catch go inside or outside a loop?
  18. Java thread creation overhead
  19. How to speed up Java VM (JVM) startup time?
  20. Hash Set and Array List performances
  21. Simple Java program 100 times slower after plugging in USB hotspot
  22. Java: how much time does an empty loop use?
  23. Java application profiling
  24. ‘ … != null’ or ‘null != ….’ best performance?
  25. Java very large heap sizes [closed]
  26. Hashmap vs Array performance
  27. Performance of WebView in JavaFX
  28. Why do finalizers have a “severe performance penalty”?
  29. Will using longs instead of ints benefit in 64bit java
  30. What GC parameters is a JVM running with?

Leave a Comment