Avian

Avian is a lightweight virtual machine and class lbrary designed to provide a useful subset of Java’s features, suitable for building self-contained applications. It's Efficient. The VM is implemented from scratch and designed to be both fast and small. - Just-In-Time (JIT) compilation for fast method execution - Generational, copying garbage collection ensures short pause times and good spatial locality - Thread-local heaps provide O(1) memory allocation with no synchronization overhead - Null pointer dereferences are handled via OS signals to avoid unecessary branches The class library is designed to be as loosely coupled as possible, allowing tools like ProGuard to aggressively isolate the minimum code needed for an application. This translates to smaller downloads and faster startup.