How do I run two scripts in parallel ?

I have a for loop that runs through a very large number of iterations. In every iteration I have two blocks 'S1' and 'S2' of codes which are themselves composed by for loops. The scripts 'S1' and 'S2' do not depend of each other.

Serial config:

for i=1:50000
  run(S1);
  run(S2);
end

I tried using batch but it slowed my program VERY much. Parallel config:

for i=1:50000
  batch(S1);
  batch(S2);
  wait(S1);
  wait(S2);
  load(S1);
  load(S2);
end

What is the best way to make my code run in parallel ?

[Walter Roberson]

Are they scripts or are they functions? Scripts are harder to deal with.

Answer 1

[Sean de Wolski]

Try parfeval, which uses an already open pool rather than opening a new one like batch and turn your scripts into functions so you're not saving/fetching unnecessary variables.