icedtea-7-jre-jamvm 7u181-2.6.14-0ubuntu0.2 (amd64 binary) in ubuntu trusty

 The package provides an alternative runtime using the JamVM. This is a
 somewhat faster alternative than the Zero port on architectures like armel,
 mips, mipsel, powerpc.
 .
 The VM is started with the option `-jamvm'. See the README.Debian for details.