J2se 6 Update - 14

: The -XX:+UseCompressedOops option was introduced to improve the performance of 64-bit JREs on heaps smaller than 32GB. It allows 64-bit JVMs to use 32-bit references, reducing memory footprint and improving cache efficiency.

, released by Sun Microsystems on May 29, 2009, was a landmark update that introduced several highly anticipated performance features and significant JVM improvements. Key Highlights and Performance Features J2Se 6 Update 14

: The release addressed over 350 bugs , making it a critical stability update for enterprise environments. J2Se 6 Update 14