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Talk:Ordered words: Difference between revisions
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→A bug (which was not really a bug) in Rexx solution: added comments about conversion problems. -- ~~~~
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20 % cost shown here would amount to how many minutes?
--[[User:Walterpachl|Walterpachl]] 05:28, 17 July 2012 (UTC)
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It's a moot point, as I '''cannot''' use ooRexx. So, the question is, is the ''procedure'' version worth the four times the execution time in the REXX that I have to use?
The answer to your question is: no, anything more than twenty hours is too long, the run takes long enough as it is.
ooRexx consumes too much virtual storage (which is just one of my concerns), and the big classic REXX program is always bumping into the 2G limit (this is for Regina REXX). What I mean is that the program frequently exhaustes virtual memory and the run (solution) has to be managed in another way, essentially breaking up the many runs into more multiple runs, which is a major pita. What I remember from 15 years ago, (IBM's o-o REXX for a big program consummed too much CPU for the this type of program (long running, lots of I/O, very big stemmed arrays) that I use. "It" is two main programs, 3825 + 330 REXX statements, plus it makes use of other classic REXX programs. I have no desire to install ooRexx and then spend many hours reworking a bunch of classic REXX programs to work with ooRexx.
Another thing to compare would be a REXX program that runs under (say) Regina REXX, and compare it to running under ooRexx (on the same hardward and operating system, of course). It would be an interesting comparison. Since ooRexx was originally (I think) written (coded) by IBM, I assume it has pretty high standards. I really don't know if IBM wrote the code or had it written elsewhere. -- [[User:Gerard Schildberger|Gerard Schildberger]] 05:58, 17 July 2012 (UTC)
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==REXX benchmarks==
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