libclone-fast-perl 0.97-1build1 (i386 binary) in ubuntu trusty

 Clone::Fast is a Perl module for quickly copying (cloning) arbitrary data
 structures. Deep references in the structure will refer to the cloned data
 structure. It is similar in concept to Storable's clone function, but is
 significantly faster since it doesn't need to convert data structures to
 and from a binary format.