Decrease JIT time

I found the following JVM tunable from IBM for os400 I was wondering
if there was a similar optiomization that can be used on Linux x64
hosts I'm running  Sun JDK 6 update 2.

Using the Just-In-Time (JIT) compiler with the Mixed-Mode Interpreter
(MMI) results in startup performance that almost equals that of compiled
code. MMI interprets your Java code until reaching the threshold
specified by the os400.jit.mmi.threshold Java system property. After
reaching the threshold, OS/400 spends the time and resources required to
use the JIT compiler to compile a method on the most frequently used
methods. Using the JIT compiler results in highly optimized code that
improves runtime performance when compared to precompiled code. When you
require improved startup performance with the JIT compiler, you can use
CRTJVAPGM to create an optimized Java program object.

Thanks.

---------- Forwarded message ----------
From: Brown, Rodrick <[email protected]>
Date: Sep 11, 2007 9:34 AM
Subject: JIT optimization
To: [email protected]



Using the Just-In-Time (JIT) compiler with the Mixed-Mode Interpreter
(MMI) results in startup performance that almost equals that of compiled
code. MMI interprets your Java code until reaching the threshold
specified by the os400.jit.mmi.threshold Java system property. After
reaching the threshold, OS/400 spends the time and resources required to
use the JIT compiler to compile a method on the most frequently used
methods. Using the JIT compiler results in highly optimized code that
improves runtime performance when compared to precompiled code. When you
require improved startup performance with the JIT compiler, you can use
CRTJVAPGM to create an optimized Java program object.


LEHMAN BROTHERS
Production Management
Equities Technology / Client Connectivity
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New York, NY 10019
(P): 212.320.0892
[email protected]

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--
Rodrick R. Brown
http://www.rodrickbrown.com

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