research how some JVM arguments would help performance

[branaway]

http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html

some interesting ones:

-XX:+UseCompressedStrings Use a byte[] for Strings which can be represented as pure ASCII. (Introduced in Java 6 Update 21 Performance Release)

-XX:+OptimizeStringConcat Optimize String concatenation operations where possible. (Introduced in Java 6 Update 20)

-XX:+UseStringCache Enables caching of commonly allocated strings.

[tunggad]

oh my god, i love your fanatical devotion to performance! Keep up pls.

But these options are not common to all JVMs, only available on HotSpot right? As JRockit is now free too, i will do some research for JRockit and post it here.

[DarkDimius]

FYI OptimizeStringConcat is bugged and can lead to jvm oops
see http://www.lucidimagination.com/blog/2011/07/28/dont-use-java-7-for-anything/

[branaway]

thanks for reminding

2012/5/28 DarkDimius <
[email protected]

FYI OptimizeStringConcat is bugged and can lead to jvm oops
see
http://www.lucidimagination.com/blog/2011/07/28/dont-use-java-7-for-anything/

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