Re: Reduce startup time for script processing?

[Carlo De Falco]

> Il giorno 04 lug 2019, alle ore 11:22, Carlo de Falco <address@hidden> ha 
> scritto:
> 
> 
> 
>> Il giorno 04 lug 2019, alle ore 11:14, Carlo De Falco <address@hidden> ha 
>> scritto:
>> 
>> 
>> 
>>> Il giorno 04 lug 2019, alle ore 09:26, Andreas Weber <address@hidden> ha 
>>> scritto:
>>> 
>>> Dear all,
>>> 
>>> I'm using GNU Octave 3.8.2 on an embedded system (RPi3) to execute
>>> scripts and print the results multiple times.
>>> 
>>> foo.m:
>>> printf ("bar\n")
>>> 
>>> $ octave -f --no-gui foo.m
>>> 
>>> This takes 1,3s on my system. Is there anything I can do to reduce the
>>> "startup" time? Preload Octave into RAM? It would be okay if the first
>>> start is slow and the subsequent runs are fast.
>>> 
>>> Thank you, Andy
>> 
>> 
>> This is just a guess, I'm not actually sure it would be any better, but you 
>> could maybe try keep octave running and communicate via a named pipe?

here's a more clean example, sorry.

foo.m:

#!/path/to/octave-cli -fq

fname = argv{1};
while true
fid = fopen (fname, "r");
a = fgetl (fid);
if (a != -1)
  disp (a)
endif
fclose (fid);
pause (.1)      
endwhile 

$ mkfifo -m a+rw tmpfile
$ chmod u+x ./foo.m 
$ ./foo.m tmpfile &
$ echo bar >> tmpfile
$ echo bar >> tmpfile

c.