reduce running time of for loop

Assume I have a code as below, how do we rewrite, so we can great reduce running time?

for i = 1: 500
  % something to do
end

[KSSV]

avoiding loop will reduce time. It depends on what is that something to do ?

Answer 1

[sakshi ahuja]

Function can be formed and relate this to your main work i.e., something u have to do, this will reduce your running time.

Answer 2

[Jan]

There is no magic command to increase the speed like:

superspeedFor i = 1: 500
  % something to do
end

As said before: You have to accelerate "something to do". If you can vectorize this part, the loop can be omitted, which is much faster in many situations.