Efficient Timer Algorithm

Question

What is the best algorithm to implement a simple timer library. The library should allow the following:

1. Timers to be started
2. Timers to be stopped

Answer 1

Best algorithm I have seen for timers is a timer wheel found in the research paper Hashed and Hierarchical Timing Wheels: Data Structures for the Efficient Implementation of a Timer Facility

I know in Java there is an implementation with Netty, JBoss and I am sure elsewhere too that you can use, if you are writing in Java.