Hi all

I finally got my test setup sorted out and I am happy to report that 
there is indeed a big improvement in compiled jacl speed.

jacl code = 134 seconds

compiled with no optimizations = 116 seconds

compiled with all optimizations (+O) = 63 seconds

Hence repetitive execution (1000's of times) of small jacl procedures in 
a large Java application definitely is improved by the new compiler.
Now that I can see substantial improvements I will be examining the jacl 
code as well to take better advantage of the compiler.

Thank you very much Mo DeJong.

Cheers

Martti

>  
>  I sincerely apologize for my previous post. The timing result for the 
>  compiled jacl code is wrong. I failed to recognize that the program was 
>  sourcing the raw jacl file as well and hence was actually interpreting 
>  the jacl code directly. I will investigate the setup some more to see if 
>  I can get a real result for compiled jacl code.
>  
>  
>  Martti Tienhaara wrote:
> >> Today's Topics:
> >>
> >>    1. A new Tcl to Java compiler for Xmas (Mo DeJong)
> >>
> > This is a great addition for the Jacl world. However I found that it 
> > doesn't provide any improvement when executing a large number of small 
> > procedures. I suspect speed improvements only occur when the overhead of 
> > setting up the environment for the compiled version at runtime is small 
> > compared to the execution time of the compiled code.
> >
> > For example 36,000 executions with various arguments of a simple 
> > procedure with about 50 lines of code gave total runtimes of
> >
> > raw jacl = 138 seconds
> > compiled jacl = 144 seconds
> > coded in java = 5 seconds
> >
> > This is embedded in a real application so a lot of execution time was 
> > consumed elsewhere in the Java code.
> >
> > I would be interested in hearing if anyone else has done any comparisons 
> > for larger jacl code procedures.
> >
> > Cheers
-- 
Martti Tienhaara (martti@dash.ca)
DASH Software Ltd.


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