Some time ago, I learned that

Code (Text):

1. on join:
2.     while player is online:
3.         #do stuff
4.         wait 5 seconds

is better than

Code (Text):

1. every 5 seconds:
2.     loop all players:
3.         #do stuff for that player

in terms of performance, which I do see. However, I noticed that if you logged out and logged on to the server fast enough, you could make the loop run multiple times.

Example:

Code (Text):

1. on join:
2.     while player is online:
3.         send "This loop was run" to player
4.         #Player leaves and rejoins during this 5 second time period
5.         wait 5 seconds

This would make a new loop start for the player, while the old one, after waiting 5 seconds, sees that the player is in fact still online, and continues.
Is there a way to make sure that this won't happen? Thanks so much!

 

Thanks!