What is escape analysis?
Escape analysis determines if an object can outlive a method invocation that created it. When a method is invoked, it will create objects, and subinvocations will create objects, and some of these objects may not be reachable when the original invocation completes, which means that these objects did not escape the invocation. Objects can escape in numerous ways, such as into static fields, as uncaught exception objects that were thrown, as returned objects, through method arguments, into other threads, into invocations that could not be followed such as native method invocations, into a field of the receiving object of the invocation, or as an object reachable (through fields or array elements) from another object that escapes.
