Multiple scripts vs 1 big script

[Noobie9876]

I have a program I want to read-out the pixels from. I need to check the upper-left area for a certain number (a 4 or a 5 which I do with rougly 15 pixel checks) and I need to search another large part for a set of pixels (roughly 500 x 600 pixels and I am looking for one with a white color).

Now the question: is it better to write 2 scripts that each check (which will cause quite a bit of process switching overhead I gues) or is it better to make 1 big script.

Better means less CPU time is used on AutoIT processing.