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Re: Using IDL's Linkimage call
| Re: Using IDL's Linkimage call [message #5055] |
Fri, 29 September 1995 00:00 |
rivers
Messages: 228
Registered: March 1991
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Senior Member |
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In article <449efn$lu5@aplinfo.jhuapl.edu>, Martha-Kusterer-S1C <kuster> writes:
> I want to speed up some code running in VMS, that makes extensive use of
> Call_External to access FORTRAN routines. I would like to find examples that
> use the linkimage call to access FORTRAN routines. My main concern is how to
> pass the variables since the example in the IDL manual does not have any
> parameters, or even very much of an example! Has anyone used it? Is it
> significantly faster than using CALL_EXTERNAL?
I do not think that LINKIMAGE is significantly faster than CALL_EXTERNAL. I use
both. What makes you think that CALL_EXTERNAL is slow? Have you benchmarked a
call to CALL_EXTERNAL which does something trivial? I really don't think there
is much overhead in CALL_EXTERNAL, I know that I can call it at least 100 times
per second.
____________________________________________________________
Mark Rivers (312) 702-2279 (office)
CARS (312) 702-9951 (secretary)
Univ. of Chicago (312) 702-5454 (FAX)
5640 S. Ellis Ave. (708) 922-0499 (home)
Chicago, IL 60637 rivers@cars3.uchicago.edu (Internet)
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