it becomes increasingly likely that your specific program will benefit from one of these feature performance enhancement
We've all heard that a lot! Assuming a linear progression of improvement is unrealistic. If performance isn't better than Perl overall now -- with allegedly a better internal data model, a better VM, and a language that's easier to optimize -- where's that speed going to come from?
I'm sure a few people here remember the Parrot benchmarks of a decade ago that showed raw Parrot performance (PASM, PBC, and I believe PIR) was generally better than Perl performance, and that was without the sort of optimizations that could have been possible (escape analysis, unboxing, JIT).
Then, there is also more in-depth work going on on the Rakudo compiler / MoarVM optimizer (including JIT optimizing).