NEC-LIST: Re: FW: NEC-List - gnu optimization

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Hello Chris, thanks a lot for the suggestions.
 
> i noticed you are not using any type of optimization in your
> compile.txt...
> Try
> g77 -fno-automatic -Wall -O6 nec2dxs.f -o nec2dxsXXX.exe
>
> i tested with "t-ant.nec" distributed with 4nec2v5 (actually the .inp
> file generated by 4nec2 5.0)
>
> using what was in your compile.txt....
> RUN TIME = 24.084
> using the above...
> RUN TIME = 14.440
> using jsut the version with 4nec2v5...
> RUN TIME = 13.340
>
 I do not quite understand...
 
 The first time I presume you used the Nec2dXS.exe compiled as described
 in my compile.txt
 The second time I presume you used the same source but with one or more
 optimization flags.
 However I can not place the third run. If the Nec2dXS*.exe belonging to
 the 4nec2 package was used it should give the same results as the first
 run because they both should be the same.
 
> also noticed you have dataflow-type compile warnings generated once
> optimization is turned on. these warnings can only be generated once
> the optimizer is on... these might be doing bad things to your
> numerics...
 
 I (and some other users) did a fair number of tests to compare the
 original nec2d*.exe results with the nec2dXS*.exe results, but found
 no particular differences.
 
 I'll see what I can do with this new warning info and check out
 the new version.
 
 Arie.
>
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