[Octave-bug-tracker] [bug #43327] dir function is too slow

[John W. Eaton]

Follow-up Comment #6, bug #43327 (project octave):

I suspect that the loop and all the "scalar" functions are the problem.  Sorry
for oversimplifying the problem by only mentioning the call to stat in my
earlier comment.

Instead of just stat, we'd need to be able to vectorize all the operations
that appear in the loop so that we can eliminate the interpreted loop and the
N calls to functions that perform operations on single values.  Then we'd have
a series of calls to vectorized functions.  It would probably still not speed
things up as much as simply providing a built-in version of dir, but it might
come reasonably close.  Plus it might be useful for those other functions to
operate on arrays anyway.


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