[Octave-bug-tracker] [bug #59711] Performance of `cd` is bad on Windows

[Markus Mützel]

Follow-up Comment #33, bug #59711 (group octave):

I can't reproduce that here on Windows 11 with Octave 9.1.90:

>> profile on
>> tic, pkg load ltfat; toc
warning: function C:\Program Files\GNU
Octave\Octave-9.1.90\mingw64\share\octave\packages\ltfat-2.3.1\sigproc\normalize.m
shadows a core library function
warning: called from
    ltfatstart at line 212 column 5
    C:\Program Files\GNU
Octave\Octave-9.1.90\mingw64\share\octave\packages\ltfat-2.3.1\PKG_ADD at line
1 column 1
    load_packages_and_dependencies at line 56 column 5
    load_packages at line 53 column 3
    pkg at line 639 column 7

Elapsed time is 2.07334 seconds.
>> profile off
>> profshow
   #               Function Attr     Time (s)   Time (%)        Calls
---------------------------------------------------------------------
 137                     cd             1.028      49.74           41
  81                addpath    R        0.634      30.65           22
 113           is_same_file             0.119       5.76         2134
 106                    dir             0.104       5.05           35
 111                  lstat             0.038       1.84         1057
  31              regexprep             0.024       1.18         2258
  83             ltfatstart             0.017       0.84            1
 109              __wglob__             0.010       0.50           35
  57 canonicalize_file_name             0.007       0.36          135
 115              localtime             0.006       0.31         1057
 128               arrayfun             0.005       0.26           35
 138                 source             0.005       0.24           20
 116               strftime             0.005       0.22         1057
  34                 strcat             0.004       0.19           43
 130                    run             0.004       0.19           20
 131              fileparts             0.004       0.17           20
  51                   load             0.004       0.17            2
 110                readdir             0.003       0.17           35
 117                datenum             0.003       0.16           35
>>


`cd` and `addpath` are the main contributors here, too. And it's taking about
2 seconds to load the package.
But that is still a lot faster than the approx. 15 seconds for you.

Where did you install Octave and the ltfat package? Is is on a local or a
network drive?
Does it make a difference if you close the "File Browser" widget while loading
the package?



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