RE: Java and CPU

["Joe Pluta" <joepluta@xxxxxxxxxxxxxxxxx>]

Larry, I was speaking to the issue of startup time, primarily.  Much of the 
startup time associated with Java-based web servers and JVMs in general is 
still due to firing up the JIT compilers.  And under the covers, there's still 
the concept of the OO language - the procedure tables required to implement 
polymorphism are still slower than direct calls.  Sure, a JIT compiler can 
alleviate some of that, but run a simple loop in a Java program and the same 
thing in RPG, and RPG will run faster.

If I'm wrong, please show me some numbers!  I haven't run the benchmarks in a 
little while.  I'll do that when I get the new box in and we'll see.  It's my 
belief there's still overhead even in the lowest level processes.  Then again, 
I could be wrong - in fact, I'd love to be wrong!  I'd like to see some numbers 
that would disprove my theory, but alas, I seriously doubt it.  My last 
benchmarks showed simple looping in Java to be an order of magnitude slower 
than RPG.  But this was a year ago, and the compiler technology may have 
helped.  But rather than just make an off-the-cuff assertion, I think I'll do 
some testing in my copious free time.

Joe

---------- Original Message ----------------------------------
From: "Larry Loen" <lwloen@us.ibm.com>
Reply-To: JAVA400-L@midrange.com
Date: Fri, 2 Mar 2001 08:34:05 -0600

>
Joe wrote:

>Java isn't eRPG, Brad.  It's an interpreted language.

This is a surprising statement.

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