On 4/7/2011 9:42 AM, Angel Luis Domínguez wrote:
On Thu, 7 Apr 2011 14:32:56 +0300, Binyamin Dissen
<[email protected]> wrote:
LE will LOAD the module on the first call and then BALR the later calls.
Change your ASM module to LOAD it and BALR as well.
I did it and now the results are for the same work in cpu seconds
ASSEMBLER: 10,584402 versus COBOL: 15,438726
I keep attending IBM presentations that assert the code generated by the C
compiler will outperform assembler. Some programmers I respect have asserted the
same thing. Every time I look into this I see the wonders of the C compiler's
optimizer--which understands cache effects and how to best use the System z
instruction pipe line.
Empirically, however, I have yet to find a program written in C or any other
language that can actually outperform a well-written assembler language program.
Every time I think I've finally found the example that proves these assertions,
it turns out the assembler program is doing something inefficient (like this
case with LOADing a service module over and over) and, once fixed the assembler
language program runs faster.
Is it just me??
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
310-338-0400 x318
[email protected]
http://www.phoenixsoftware.com/
