JIT and new JAVA114 fix for OS2

[Fantin Massimo]

Hello ,

Thanks to all for previous replay :-)

I Have try to run java114 with classes.zip compressed but don't work in my
netscape 2.02 with java11 patch, like with classes.zip at original states :(

(and from 1.1.2 will should work  ... Boo )

Well , other question , i have upload the new fix for java114 for os2, and now
the JIT work with the swing 0.7 package :-) (I have remove from config
the "SET JAVA_COMPILER=JIT_OFF" used previously for run swing )

What the different from use and not use of this SET ?

Performance ?

Thanks
Fantin Massimo
a beginer in use of netrexx and java





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[K.-P. Kirchdoerfer]

On Mon, 26 Jan 98 13:26:28, Fantin Massimo wrote:

>Well , other question , i have upload the new fix for java114 for os2, and now
>the JIT work with the swing 0.7 package :-) (I have remove from config
>the "SET JAVA_COMPILER=JIT_OFF" used previously for run swing )

Good to hear, I'll check it out...

>
>What the different from use and not use of this SET ?

A major difference is that disabling the JIT allows you to see the
line where an exception occured, very useful for debugging.

>Performance ?
 In theory yes, in practice disabling the JIT didn't impact the
performance of java programs, tested with NetRexx compiler and my own
project. Still wondering...

kp
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[dIon Gillard/Multitask Consulting/AU]

At 13:26 26/01/98, Fantin Massimo wrote:
>Hello ,
>
>Thanks to all for previous replay :-)
>
>Well , other question , i have upload the new fix for java114 for os2, and
now
>the JIT work with the swing 0.7 package :-) (I have remove from config
>the "SET JAVA_COMPILER=JIT_OFF" used previously for run swing )
>
>What the different from use and not use of this SET ?
It runs faster with the JIT on.

>Performance ?
Yep...


dIon Gillard
Sun Certified Java 1.1 Programmer
Work: http://www.multitask.com.au
NetRexx: http://www.multitask.com.au/netrexx
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[maxmars-2]

Ciao,

> >Performance ?

>  In theory yes, in practice disabling the JIT didn't impact the
> performance of java programs, tested with NetRexx compiler and my
> own project. Still wondering...

Well, JIT seems to have an impact on performances here, at least with
my NetRexx DB classes. :-)

On a DB with some 10k records, a complex query that returns some 1.5k
record takes about 14-16 secs with JIT enabled, 25-30 without. I
think that this fact has to do with optimization of Rexx strings
manipulation and loops -- there are a lot in the query subsystem.
Perhaps speed improvements show up when you really stress things a
lot?

[YMMV, as ever!]

Max
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