few JIT questions

i'm interested in tuning up my code for performancewhat are some compiler options for me to generate JIT codes?or JIT is already turn-on by default or do i still need to use "java -server" when i run it?

[232 byte] By [nullera] at [2007-10-2 10:01:15]

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# 1

JIT has been incorporated into the HotSpoe compiler. The -server compiler still exists.Check the Performance link (lower right corner of the page) here: http://java.sun.com/Also http://java.sun.com/j2se/1.5.0/docs/guide/vm/index.html

ChuckBinga at 2007-7-13 1:12:10 >

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# 2

but when you compiledoes it compile Java source to machine on-the-fly ?or do i need to specify an option for it?

nullera at 2007-7-13 1:12:10 >

# 3

> when you compile does it (the Hotspot compiler) compile Java source to machine on-the-fly ?

> or do i need to specify an option for it?

When you run Java bytecode the Hotspot compiler will be used.

You can control which one and exactly what you want it to do.

[url=http://blogs.sun.com/roller/resources/watt/jvm-options-list.html]A collection of Java VM Options[/url]

Look at

-server

-client

-Xint

-Xcomp

-Xmixed

tschodta at 2007-7-13 1:12:10 >

# 4

wowthat's what i really wantthanks for your list

nullera at 2007-7-13 1:12:10 >

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