14 | J2se 6 Update

: A new optimization ( -XX:+DoEscapeAnalysis ) allowed the compiler to determine if an object is "escaped" (used outside a method). If it isn't, the JVM can allocate the object on the stack instead of the heap, significantly speeding up execution and reducing garbage collection overhead.

, 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

Update 14 was essentially a "feature backport" release. By including G1 and compressed pointers, Sun gave developers a preview of the performance gains coming in Java 7 while maintaining the stable environment of Java 6. : A new optimization ( -XX:+DoEscapeAnalysis ) allowed