Re: speed up calculation suggestions
- From: glen herrmannsfeldt <gah@xxxxxxxxxxxxxxxx>
- Date: Tue, 13 Nov 2007 16:32:08 -0800
rleavitt@xxxxxxxxxxxxxxxx wrote:
I am an actuary and not a system professional and so please bear with
me. We use Fortran for some or our calculations and are being hampered
by long calculation times. There is nothing fancy in the code... I
process many millions of records from text files through some fairly
simple calculations, and write out the results. I want to speed up
this process, but am really not sure where to devote my efforts. I
have a new (dual core) windows XP machine with F95 compiled by
absoft. (I think version 7.5). I do not have much system support and
not too much time for experimentation, but am willing to tinker a
little. I am interested in other's thoughts.
(snip of options)
Current systems should be fast enough to do a reasonably amount
of processing on millions of records in an hour. You don't say what
kind of calculations you are doing, or how big the records are.
There may be some obvious (to experienced programmer) changes that
could make a large difference in the time, or it might be that you
are actually limited by the processing needed.
If you can post some code you will get more suggestions.
As one example, going through a multi-dimensional array in the
wrong order can slow down a program by a large factor.
-- glen
.
- References:
- speed up calculation suggestions
- From: rleavitt
- speed up calculation suggestions
- Prev by Date: Re: How to Make F77 Program Faster (g95 compiler) ??
- Next by Date: Re: How to Make F77 Program Faster (g95 compiler) ??
- Previous by thread: speed up calculation suggestions
- Next by thread: Re: speed up calculation suggestions
- Index(es):
Relevant Pages
|
