Most Efficient Way to Give Players Countdown Timers?

So I need to know the best way to give a seperate countdown timer to different people. I can either store their info in a HashMap, with their current time remaining, and run an async task to remove 1 from all the players currently alive, or I could create 1 async task for every player that automatically tracks the data. Which way would be better for a lot of people? Is there an even better way?

Also, same thing for if I have a bunch of games running on a single plugin, should I have 1 async task loop through the games and call game.tick() on all of them, or have each of them have their own task?

 

Either options are fine, really. You either have a function iterating over a bunch of players/games or a function iterating over a bunch of classes. I implemented it myself by creating a Countdown object for each player and having a sync task in there (it implements Runnable, too).

 

What do you mean sync task (it implements runnable too)?

 

NerdsWBNerds The class I made (Countdown) implements runnable and in the constructor it schedules itself to a sync task.