Re: [Jython-users] Can I import parallel python module in Jython? / What is slow ?

[<cl...@br...>]

DearTeresa, 

 I listened to similar comments, when I started to program an interpreted 
language, which was the BASIC on a IBM 360 CALL system, around year 1971. 
The BASIC language was running slower compared to the  ALGOL and FORTRAN. 
Later, many people told me about the slowness of REXX and VM. Well I will 
not even mention to you, about what my colleagues told, when I started to 
program JAVA in the year 1994.  The language implements a Byte Code and 
Java Virtual Machine, running 10 times slower compared to compiled C code. 
 Talking about PYTHON is all the same story. 

 Meanwhile many real objects has been designed, engineered with those 
slow, interpreted  languages and tools, resulting in the construction of 
hydropower plants, highly efficient gas turbines. naval ships, air planes, 
particle accelerators and others. Many commercial systems today rely on 
JAVA and it tries to catch up with C speed, by use of improved JVM´s.  

 Please also think about the evolution of the CPU power, which indeed 
doubles its speed rate every year. What is today known as a slow computer, 
next year will be fast running one.  My personal Jython environment is 
running on a LINUX Grid CPU hosted at a large data center. Its performance 
can't be qualified as "low performance", indeed it its far beyond my 
expectations.  "Jythonizing" the Java code is a clear "plus" when it comes 
to system robustness, easy code maintenance and it also helps to reduce 
the  development costs. 

Regards, 
Claude
 
Teresa wrote: 
Thanks for the info. I guess I'll hold on on that right now, because early 
results of single-threaded runs show that the application in Jython is 3 
times slower than its counterpart in Java, As our product is supposed to 
be a high performance engine, I see little interest in implementing 
anything in Jython to use it. The only points I could see in favor of 
using Jython is for the readability of the code, it's typically a lot 
smaller and less verbose than Java applications and for the fast 
development. 

As I'm a newbie in Jython, maybe we can improve things a little if the 
code is well written, but still, I believe 3 times is a lot of ground to 
cover in a pure code review.

Claude Falbriard 
Developer 
AMS Hortolândia / SP - Brazil 
phone: +55 13 8117 3316
e-mail:  cl...@br...