java Programming Glossary: performance

Standard concise way to copy a file in Java?

http://stackoverflow.com/questions/106770/standard-concise-way-to-copy-a-file-in-java

copying files NIO can significantly increase file copying performance in a large part because the NIO routines defer copying directly.. bytes through the Java layer. So if you're looking for performance it might be worth checking that you are using a recent version..

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

independent terms the order should not matter. java c performance optimization branch prediction share improve this question.. some hacks if you are willing to sacrifice readability for performance. Replace if data c 128 sum data c with int t data c 128 31 sum..

StringBuilder vs String concatenation in toString() in Java

http://stackoverflow.com/questions/1532461/stringbuilder-vs-string-concatenation-in-tostring-in-java

at what point do you switch from concat to builder java performance string concatenation stringbuilder share improve this question.. and the compiler will in fact turn it into version 2 no performance difference whatsoever. More importantly given we have only 3..

Avoiding “!= null” statements in Java?

http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java

environment although my testing has shown next to no performance impact from assertions. Not using assertions in this case is..

How do I “decompile” Java class files?

http://stackoverflow.com/questions/272535/how-do-i-decompile-java-class-files

get Java code or is it just JVM assembly code On Java performance questions on this site I often see responses from people who..

When to use LinkedList<> over ArrayList<>?

http://stackoverflow.com/questions/322715/when-to-use-linkedlist-over-arraylist

faster but unless you're doing something really performance sensitive you shouldn't worry about this they're both constants...

Switch Statement with Strings in Java

http://stackoverflow.com/questions/338206/switch-statement-with-strings-in-java

the delay was not provided but it likely had to do with performance. Implementation in JDK 7 The feature has now been implemented.. to be sorted at compile time. At runtime while the O 1 performance of tableswitch generally appears better than the O log n performance.. of tableswitch generally appears better than the O log n performance of lookupswitch it requires some analysis to determine whether..

How do I write a correct micro-benchmark in Java?

http://stackoverflow.com/questions/504103/how-do-i-write-a-correct-micro-benchmark-in-java

micro benchmarks they measure only a limited range of JVM performance characteristics. Rule 1 Always include a warmup phase which.. server to client and regular to OSR if you are after best performance. Rule 4 Be aware of initialization effects. Do not print for..

Connection pooling options with JDBC: DBCP vs C3P0 [closed]

http://stackoverflow.com/questions/520585/connection-pooling-options-with-jdbc-dbcp-vs-c3p0

into our test application and struggled to reach levels of performance which C3P0 was more than capable of handling without any exceptions... said I haven't yet experienced this new upgraded library's performance nor heard of it being de facto in any recent app framework yet...

When to use <ui:include>, tag files, composite components and/or custom components?

http://stackoverflow.com/questions/6822000/when-to-use-uiinclude-tag-files-composite-components-and-or-custom-componen

specification in case of composite components Could performance differ java jsf 2 facelets composite component tagfile share.. on this question Custom Facelet component in JSF . Could performance differ The performance concern is negligible. The choice should.. Facelet component in JSF . Could performance differ The performance concern is negligible. The choice should be made based on the..

How to choose the right bean scope?

http://stackoverflow.com/questions/7031885/how-to-choose-the-right-bean-scope

Note that the scope should rather not be chosen based on performance implications unless you really have a low memory footprint and..

Face detection in java

http://stackoverflow.com/questions/1182849/face-detection-in-java

Linux is a must OS X and windows are very nice to have. Performance isn't a big deal can be slow it's for server offline processing...

Netty vs Apache MINA

http://stackoverflow.com/questions/1637752/netty-vs-apache-mina

liked the cleaner API and much better documentation. Performance seemed better on paper too. More importantly we knew that Trustin..

Garbage Collection in Java and Circular References

http://stackoverflow.com/questions/1910194/garbage-collection-in-java-and-circular-references

A The Truth About Garbage Collection in Java Platform Performance Strategies and Tactics free ebook also available on Safari for..

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

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

From Chapter 2 of the whitepaper The Java HotSpot Performance Engine Architecture The JDK includes two flavors of the VM a..

http://stackoverflow.com/questions/2422289/any-recommended-java-profiling-tutorial

tutorial I am now using JProfiler and Eclipse Test Performance Tools Platform TPTP with my profiling. However although equipped..

What is the difference between String and StringBuffer in Java?

http://stackoverflow.com/questions/2439243/what-is-the-difference-between-string-and-stringbuffer-in-java

is used to represent characters that can be modified. Performance wise StringBuffer is faster when performing concatenations...

Why does the JVM still not support tail-call optimization?

http://stackoverflow.com/questions/3616483/why-does-the-jvm-still-not-support-tail-call-optimization

improve this question Diagnosing Java Code Improving the Performance of Your Java Code explains why the JVM does not support tail..

Java Reflection Performance

http://stackoverflow.com/questions/435553/java-reflection-performance

Reflection Performance Does creating an object using reflection rather than calling..

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

other choices do we have After watching the presentation Performance Anxiety of Joshua Bloch I read the paper he suggested in the..

Performance of Java matrix math libraries? [closed]

http://stackoverflow.com/questions/529457/performance-of-java-matrix-math-libraries

of Java matrix math libraries closed We are computing something..

for loop optimization

http://stackoverflow.com/questions/6093537/for-loop-optimization

for second but I personally would go for for each for each Performance From Item 46 in Effective Java by Joshua Bloch The for each..

Why are interface method invocations slower than concrete invocations?

http://stackoverflow.com/questions/6839943/why-are-interface-method-invocations-slower-than-concrete-invocations

they turned on the JIT . The documentation does now say Performance Myths Previous versions of this document made various misleading..

What is the best macro-benchmarking tool / framework to measure a single-threaded complex algorithm in Java? [closed]

http://stackoverflow.com/questions/7146207/what-is-the-best-macro-benchmarking-tool-framework-to-measure-a-single-threade

graphical trend analysis no statistics The Test Performance Tools Platform is a huge generic and extensible tool platform..

Hibernate, iBatis, Java EE or other Java ORM tool

http://stackoverflow.com/questions/716532/hibernate-ibatis-java-ee-or-other-java-orm-tool

Curve Ease of Use Productivity Maintainability Stability Performance Scalability Ease of Troubleshooting If you were to manage a.. how many times this has been useful to me over the years. Performance Scalability Here I think ibatis wins hands down. It's straight..

Java Memory explained (SUN JVM)

http://stackoverflow.com/questions/858250/java-memory-explained-sun-jvm

Java HotSpot Virtual Machine v1.4.x to Improve the Performance and Scalability of Application Servers discussion of low pause.. of Application Servers discussion of low pause collectors Performance Documentation for the Java HotSpot VM Improving Java Application.. for the Java HotSpot VM Improving Java Application Performance and Scalability by Reducing Garbage Collection Times and Sizing..

Convert from byte array to hex string in java

http://stackoverflow.com/questions/9655181/convert-from-byte-array-to-hex-string-in-java

I mean the alternative code offered in the discussions. Performance is equivalent to Commons Codec which uses very similar code...