[tcljava-dev] Re: Tcl Java Compiler

[Martti T. <ma...@da...>]

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 (ma...@da...)
DASH Software Ltd.