¡@

Home 

java Programming Glossary: optimization

Does the JVM prevent tail call optimizations?

http://stackoverflow.com/questions/105834/does-the-jvm-prevent-tail-call-optimizations

the JVM prevent tail call optimizations I saw this quote on the question What is a good functional.. post Recursion or Iteration might help. In short tail call optimization is hard to do in the JVM because of the security model and the..

Why is processing a sorted array faster than an unsorted array?

http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array

terms the order should not matter. java c performance optimization branch prediction share improve this question You are the..

Swing animation running extremely slow

http://stackoverflow.com/questions/14886232/swing-animation-running-extremely-slow

it run smoothly java multithreading performance swing optimization share improve this question Based on this previous answer..

Java NIO FileChannel versus FileOutputstream performance / usefulness

http://stackoverflow.com/questions/1605332/java-nio-filechannel-versus-fileoutputstream-performance-usefulness

System.out.println Time taken time2 time1 ms java optimization file nio operations share improve this question My experience..

Real differences between “java -server” and “java -client”?

http://stackoverflow.com/questions/198577/real-differences-between-java-server-and-java-client

compiler does not try to execute many of the more complex optimizations performed by the compiler in the Server VM but in exchange.. adaptive compiler that supports many of the same types of optimizations performed by optimizing C compilers as well as some optimizations.. performed by optimizing C compilers as well as some optimizations that cannot be done by traditional compilers such as aggressive..

What is the relative performance difference of if/else versus switch statement in Java?

http://stackoverflow.com/questions/2086529/what-is-the-relative-performance-difference-of-if-else-versus-switch-statement-i

if statement share improve this question That's micro optimization and premature optimization which are evil. Rather worry about.. this question That's micro optimization and premature optimization which are evil. Rather worry about readabililty and maintainability..

Fastest way to determine if an integer's square root is an integer

http://stackoverflow.com/questions/295579/fastest-way-to-determine-if-an-integers-square-root-is-an-integer

ever have to maintain this code. And this kind of micro optimization could actually make a difference since part of the challenge.. This is because array bounds are checked in Java . java optimization math project euler perfect square share improve this question..

How slow are Java exceptions?

http://stackoverflow.com/questions/299068/how-slow-are-java-exceptions

within the same method method3 but this is a special JIT optimization I would not rely upon. And even when using this optimization.. I would not rely upon. And even when using this optimization the throw is still pretty slow. So I don't know what you are..

Why does Java's hashCode() in String use 31 as a multiplier?

http://stackoverflow.com/questions/299304/why-does-javas-hashcode-in-string-use-31-as-a-multiplier

better performance 31 i i 5 i . Modern VMs do this sort of optimization automatically. from Chapter 3 Item 9 Always override hashcode..

Difference between Statement and PreparedStatement

http://stackoverflow.com/questions/3271249/difference-between-statement-and-preparedstatement

above. Thus when creating a Prepared Statement some pre optimization is performed immediately. The effect is to lessen the load on..

Change private static final field using Java reflection

http://stackoverflow.com/questions/3301635/change-private-static-final-field-using-java-reflection

problem is that the specification allows aggressive optimization of final fields. Within a thread it is permissible to reorder..

If profiler is not the answer, what other choices do we have?

http://stackoverflow.com/questions/4387895/if-profiler-is-not-the-answer-what-other-choices-do-we-have

Should we go back and just use our feeling to do optimization UPDATE A point that seems to be missed in the discussion is..

when to use StringBuilder in java

http://stackoverflow.com/questions/4645020/when-to-use-stringbuilder-in-java

is being mentioned as obsolete at obsolete java optimization tips as well as at java urban myths . java string performance..

Where do I find a standard Trie based map implementation in Java?

http://stackoverflow.com/questions/623892/where-do-i-find-a-standard-trie-based-map-implementation-in-java

Thus there are many shared prefixes. java algorithm optimization trie share improve this question You might want to look..

Java Reflection: How to get the name of a variable?

http://stackoverflow.com/questions/744226/java-reflection-how-to-get-the-name-of-a-variable

is often stored in class files. One compile time optimization is to remove it saving space and providing some obsfuscation..