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18/04/2013

JRockit vs HotSpot JVM Difference


Jrockit was developed by Appeal Virtual Machines and acquired by BEA Systems, and later on acquired by Oracle.
HotSpot is a Java Virtual Machine (JVM) currently hold by Oracle Corporation. 

JRockit is based on the HotSpot JVM by Sun Microsystems, and now Oracle. It has been developed in order to make HotSpot more reliable, and faster to used in server side environment. Jrockit has a slightly bit different heap organisation, garbage collector methods, and optimisations. More information about GC for HotSpot can be found here.


Although JRockit is supposed to have more optimised functions, it is not the rule. Some applications might run faster under HotSpot, and some can be tuned more for JRockit. You don't know it until you try it :)


Additional information:

http://en.wikipedia.org/wiki/JRockit
http://stackoverflow.com/questions/8068717/jrockit-jvm-versus-hotspot-jvm
http://www.oracle.com/technetwork/middleware/jrockit/overview/index.html

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