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List:       openjdk-hotspot-runtime-dev
Subject:    Can the JIT be turned off in JavaSE 5?
From:       Keith.McGuigan () Sun ! COM (Keith McGuigan)
Date:       2009-04-25 0:44:14
Message-ID: 49F25CDE.2050809 () sun ! com
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You can turn off the JIT by running with -Xint  (forces just the 
interpreter).

--
- Keith

Basler Mark wrote:
> Hi Guys,
> 
> I am having trouble finding whether the JIT is always on in JavaSE 5 or 
> that it can still be turned off by using "-Djava.compiler='NONE'".
> 
> I want the JIT on, but I just found a script that is being used in a 
> legacy system that has this setting and I want to see if it matters 
> anymore...
> 
> I did find an excerpt in "Java in a Nutshell" that states:
> "This environment variable and property are no longer used as of Java 
> 1.4, which uses the HotSpot VM, which includes efficient JIT technology."
> 
> I have been looking around on the java.sun.com site and found references 
> to -Djava.compiler in the following places...
> 
> http://java.sun.com/javase/6/docs/technotes/guides/jni/spec/invocation.html
> http://java.sun.com/javase/6/webnotes/6u4.html
> http://java.sun.com/j2se/1.5.0/docs/guide/plugin/developer_guide/debugger.html
> http://java.sun.com/j2se/1.5.0/docs/guide/deployment/deployment-guide/jcp.html
> http://java.sun.com/developer/onlineTraining/Programming/JDCBook/perf2.html
> So I am really not 100% sure, either way...
> 
> Can someone who definitively knows let me know...
> 
> I also posted this on the Java forum at 
> http://forums.sun.com/thread.jspa?threadID=5382536&messageID=10689611#10689611
> 
> 
> Thanks for your help - Mark :-)
> 



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