How can I measure time with microsecond precision in Java?

Question

I saw on the Internet that I was supposed to use System.nanoTime() but that doesn\'t work for me - it gives me the time with milliseconds precision. I just need

Answer 1

You have to repeat the tests thousands of times. There are lots of things happening that will influence your measurements, like garbage collection, I/O, swap in/out, the size of the ready-queue threads, etc.