Java SE 6 Update 14 Release Notes. - Oracle
: Update 14 marked the first time the G1 collector was available to the public. It was designed to replace the Concurrent Mark-Sweep (CMS) collector, offering better predictability and reduced heap fragmentation through incremental compaction. J2Se 6 Update 14
This update featured , which integrated several optimizations originally slated for later versions like Java 7. Java SE 6 Update 14 Release Notes
: The release addressed over 350 bugs , making it a critical stability update for enterprise environments. 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.