Working a day long on work sheets that do "pseudocompile" well enough, only when the box is tired it needs foods ... "Windows is low in memory". Whether the memory is full of information or filled with pointers, better experts could precise. Over the years, I observed that some type of work would starve the machine sooner, but that's not much of a trace evidence. It became a proof while working on that session for Kristjan. It's a two pages sheet doing apparently nothing or so little versus an 80 pages collection, but, the but is there. In 2003, Robert wrote that recursive should be avoided as much as possible... quite true.
What that work sheet does: few peanuts CFFT, ICFFT and DeCasteljau 6 pairs recursive. From a fresh start [not restart], the recursive starts getting visibly slow at about � dozen modifications of the points. Then the hyperfast CFFT/ICFFT start getting slow, very slow. The end of the story is that the "Run time error" is about to display and in few more steps of curve fitting, the all damned box plugs. The CFFT/ICFFT consume little memory at 200 points. By itself, the recursive just builds two more peanut vectors.
All what it says it that this particular recursive "hide and seek" every time in a new place, harder and harder to retrieve at each run up to the point that there is no way to retrieve at all.
Most if not all memory leaks were reported about Mathcad 14. Conclusively, the very Mathcad inner structure is not suitable for recursive. Conclusively again, it could very well be that the attractive recursive has been over implemented in that version. Or in two words: which one make the other suffer ... Mathcad==>Windows or vice versa ?
Let's take it factual, comparing two Mathcad sessions. Working a day long [in fact several days] searching for the Rayleigh model, how many times the Given/Minerr was used ... 100's of times ... Mathcad never complained neither the box crashed. From fresh start, in � dozen fitting the recursive NURBS ... the session ends. The vectors of values are totally negligible but the memory has like vanished in the reported words from collabs ... "memory leak".
I wrote this long observation because no time to write it shorter.
jmG
