Double-Word Alignment (longs and doubles) to 8-Byte Boundaries in the Heap

Double-word values are now aligned to 8-byte boundaries in the heap. This alignment improves the performance of both native code and JIT-compiled Java code while ensuring correctness of volatile double-word values on SPARC systems. However, if your application allocates and retains many small objects, you might need to increase your heap size(s) slightly, as these objects are allocated in multiples of 8 bytes, increasing memory usage.