[Octave-bug-tracker] [bug #55427] save -v7 exits with "error compressing data element"

[Philip Nienhuis]

Follow-up Comment #17, bug #55427 (project octave):

It occurred to me that I could also try to load the individual .mat files
directly in Matlab; I'll do that tonight.

My aim was primarily to check if Octave correctly saves the various compressed
data.
Your explanation (thanks!) almost makes for another feature request: Octave
showing its overhead for storing data structures :-) Could be enlightening if
not confronting info.
I already figured years ago that the "gis" struct in my example is probably
quite memory-inefficient; each field contains structs containing o.a., struct
arrays of grids each with fairly different dimensions. There must be a lot of
"air" in the data structure in RAM. But I didn't expect a factor of 4 even in
Matlab ...
(OTOH that struct is very efficient for how it is used, but that's quite
another story)

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