When making numeric comparisons is various triggers, if I know the exact value that needs to be checked, does it matter whether I use

* At least
* At most
* Exactly

I have recalled reading that Exactly might be the most efficient / fastest if I just need to check a single value. E.g. suppose I want to know if a player commands a hero unit, and I know it's impossible for them to ever have more than 1.

Logically I could do Commands At Least 1 or Commands Exactly 1. Would the "Exactly" comparison be slightly more efficient? Or is it all the same under the hood?

The game always does a full tally (in other words, it doesn't stop counting upon reaching a value that can falsify the condition), so there's no difference in performance between the comparison modifiers. Using the "Foes", "Allies", "Neutral Players", "All Players", and "Non Allied Victory Players" groups are marginally more expensive since they go through every active player checking for alliance status with the trigger owner, but still won't have a humanly discernible hit to performance.