I am creating an app that will log stats for a game server that I run. The app will check the status of a fiile and if the file changes then the app will retrieve data from that file and add it to a database. The app will check this file once every minute and if the files changed then it does its thing. My question is this: What do I use as a timer ? Do I use just a simple timer to count down from 1 minute over and over again or is there a more efficient way to do this. I do not want to the program to eat up CPU time if possible.