The name cperl stands for a perl with classes, types, compiler support, or just a company-friendly perl, but currently it's only a better 5.22 based variant without classes.
Currently it is about 1.5x faster than perl5.22 overall, >2x faster then 5.14 and uses the least amount of memory measured since 5.6, i.e. less than 5.10 and 5.6.2, which were the previous leaders. While perl5.22 uses the most memory yet measured.
See http://perl11.org/cperl/STATUS.html and http://perl11.org/cperl/ for an
overview, changes and docs.
Detailed changes are at https://github.com/perl11/cperl/blob/master/Changes
./Configure -sder -Dusecperl && make -s -j4 test && sudo make install