4
$\begingroup$

I'm using I need to load data in some files on a windows network share (samba), mounted on OSX. When listing the relevant directory in a shell, the performance is acceptable:

% time ls $DIR|wc -w
   26542
ls -G $DIR  0.05s user 0.33s system 98% cpu 0.376 total
wc -w  0.00s user 0.00s system 1% cpu 0.376 total

Compared to MMA:

In[36]:= fn = FileNames[All, dir]; // AbsoluteTiming

Out[33]= {30.8174, Null}

Compared to local MMA (for the same dir):

In[36]:= fn = FileNames[All, dir]; // AbsoluteTiming

Out[33]= {0.206, Null}

Edit

It seems that MMA is making an excessive amount of system calls since when listing the share mounted on (Windows 10) localhost is still very slow, though much faster:

In[36]:= fn = FileNames[All, dir]; // AbsoluteTiming

Out[33]= {2.502, Null}
Improve this question
$\endgroup$
3
  • $\begingroup$ I am almost certain that something very similar was already asked (possibly years ago), but I can't seem to find it. You might want to search the site a bit more, maybe something comes up. Also: I would definitely report this to Wolfram. $\endgroup$
    – Szabolcs
    Mar 18, 2020 at 9:39
  • $\begingroup$ This is the only related question I could find, unanswered: mathematica.stackexchange.com/questions/108103/… $\endgroup$
    – Carl Lange
    Mar 18, 2020 at 9:58
  • $\begingroup$ Neither could I find anything remotely similar except for what @CarlLange linked. $\endgroup$
    – Shwouchk
    Mar 18, 2020 at 20:26

0

Reset to default

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.