I have heard that some JVMs are significantly faster than others. Especially HotSpot is told to be very fast.
But which JVM do I already use?
$ java -version java version "1.6.0_20" OpenJDK Runtime Environment (IcedTea6 1.9.13) (6b20-1.9.13-0ubuntu1~10.04.1) OpenJDK Server VM (build 19.0-b09, mixed mode)
Which JVM get used in the free official download?