[Octave-bug-tracker] [bug #59711] ltfat - 30 seconds to load the package

[Nicholas Jankowski]

Follow-up Comment #3, bug #59711 (project octave):

just tried it as well running ltfat 2.3.1 on Octave 6.1.0 on Windows 10 with
the gui.

I noticed when loading the package, the File Browser window spent a lot of
time moving pack and forth between different folders.  It appears it is
explicitly traversing the numerous cd and addpath commands, and I have noticed
previously (even on v5.1) that in the GUI octave was really slow when changing
directory depending on the number of files in that folder. 

my profshow results:


>> profile clear; profile on; pkg load ltfat; profile off; profshow
   #                       Function Attr     Time (s)   Time (%)        Calls
-----------------------------------------------------------------------------
 139                             cd             9.417      40.13           41
  74                        addpath    R        7.235      30.83           22
 113                          lstat             2.682      11.43         1057
 144                     javaMethod             0.651       2.77            3
 115                   is_same_file             0.554       2.36         2134
 100                            dir             0.524       2.23           35
 140                         source             0.451       1.92           20
  76                     ltfatstart             0.422       1.80            1
  85                          exist             0.222       0.95           59
  27         canonicalize_file_name             0.211       0.90          130
  70                           stat             0.135       0.57           59
 133                      fileparts             0.125       0.53           20
 132                            run             0.119       0.51           20
 103                      __wglob__             0.095       0.40           35
 105                         strcat             0.078       0.33           35
 137                         rindex             0.062       0.26           20
  58                      regexprep             0.049       0.21         2152
  20                  load_packages             0.035       0.15            1
  49 load_packages_and_dependencies             0.035       0.15            1
   1                            pkg             0.026       0.11            1


running under Octave CLI it doesn't seem any faster.  


octave:1> profile clear; profile on; pkg load ltfat; profile off; profshow
   #               Function Attr     Time (s)   Time (%)        Calls
---------------------------------------------------------------------
 141                     cd             9.328      43.49           41
  77                addpath    R        7.021      32.73           22
 115                  lstat             2.287      10.66         1057
 117           is_same_file             0.528       2.46         2134
 102                    dir             0.434       2.02           35
  79             ltfatstart             0.306       1.43            1
  88                  exist             0.216       1.01           59
  51 canonicalize_file_name             0.198       0.92          130
 146             javaMethod             0.151       0.70            3
 142                 source             0.119       0.55           20
  73                   stat             0.119       0.55           59
 135              fileparts             0.105       0.49           20
 134                    run             0.103       0.48           20
 105              __wglob__             0.074       0.35           35
 107                 strcat             0.059       0.28           35
 139                 rindex             0.050       0.23           20
  17              regexprep             0.045       0.21         2155
   1                    pkg             0.027       0.13            1
  45          load_packages             0.026       0.12            1
  46     installed_packages             0.024       0.11            1


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