Perl was never intended to be fast for computers. It was intended to be fast for programmers. Perl 6 does a pretty darn good job of that, and additionally already has working and easy-to-use C/C++-compatible FFI that I can use today to offload things that really do require maximum computational performance (that latter point wasn't true for cperl last I checked; "extern sub ..." is still a "todo" item AFAICT, and I don't really see an equivalent to Perl 6's "is repr(CPointer)").
"and unusable for professional usage."
By what measure? More importantly, by what measure in which cperl fares any better?
"more features"
Not at all the impression I'm getting from perl11.org/cperl in relation to Perl 6. What you're saying is certainly true in relation to Perl 5, though.