Some problems about server-side modding

[SonMooSans]

I want to make a mod that will track the player's position per 5s, then ops can get a list of players and TP to their position by using a command.

but after I finished it and start debugging. Here's a big problem of delay, I tested it on a small server that only have myself

it takes at least 2s to run. What if it runs on a large server?

[kiou.23]

doesn't vanilla already allow you to tp to any player's position?

[SonMooSans]

Bec I want to add a command to list all the players' position so ops don't have to check them one by one

something like: "Bob X:1 Y:20 Z:20"

                          "Stave X:2 Y:1 Z:10"

[diesieben07]

Show your code.