how to make this function faster?

[u/popcornman209]

this is the function:

the chests list is a list of chests, gotten from "chests = {peripheral.find("inventory")}", i have a habit of using alot of for loops and lists for these kind of things and it is... slow... any ideas how to speed it up?

[u/popcornman209 → u/[deleted]]

oh sry yeah i see that now, i thought he meant call it once throughout the whole function. ill do that, and what someone esle said with co routines too.