JEP 318 – Epsilon

Epsilon is a so-called no-op garbage collector that basically does nothing. Its use cases include testing for performance, memory pressure, and the virtual machine interface. It also could be used for short-lived jobs or the jobs that do not consume much memory and do not require garbage collection. 

We discussed this feature in more details in the recipe Understand Epsilon, a low-overhead garbage collector recipe in Chapter 11, Memory Management and Debugging.