[Octave-bug-tracker] [bug #50416] dir command is very slow with large directories

[Rik]

Update of bug #50416 (project octave):

                  Status:         Patch Submitted => Fixed                  
             Open/Closed:                    Open => Closed                 
                 Release:                   4.2.1 => dev                    

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Follow-up Comment #5:

I checked in the a change that speeds things up by 2.3X
(http://hg.savannah.gnu.org/hgweb/octave/rev/529c6d0c6684).  That hit the easy
issues of fullfile and fileparts.  I checked in another more complicated
change that arranges to call datenum just once, rather than in every iteration
of the for loop, which gives another ~2X speed up
(http://hg.savannah.gnu.org/hgweb/octave/rev/21fc54e4bb7b).  Overall, the
function is now about 5X faster.

I think that's probably good enough.  The original reporter's time will go
from 728 milliseconds to 145 milliseconds.  That is still well slower than a
compiled C++ function, but well within what a human can tolerate.

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