[Octave-bug-tracker] [bug #64557] New Virtual machine (VM): Performance issues with structs of cell arrays

[anonymous]

Follow-up Comment #2, bug #64557 (project octave):

Add-On: 
The same performance issue where the VM is materially slower than the octave
interpreter exists for cell arrays containing a cell array or even a cell
array containing just a matrix. 

So obviously the VM does not cope well with nested data structures from a
performance perspective.


function retval = test1()
  a = cell(1,1);
  a{1} = cell(100000,1);
  for i=1:100
     set_idx = rand(100000,1) < 0.001;
     a{1}(set_idx) = [sin(i), cos(i)];
  endfor
  retval = a;
endfunction

clear test1; __enable_vm_eval__ (1); tic; a= test1(); toc;
Elapsed time is 0.14317 seconds.

clear test1; __enable_vm_eval__ (0); tic; a= test1(); toc;
Elapsed time is 0.0665581 seconds


    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?64557>

_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/