Pycket has different performance characteristics from many of the AOT systems we compared against. On average Pycket is ~2x faster than the Racket VM, ranging from ~3x slower to ~300x faster depending on the benchmark. Last I checked, Pycket's mean performance was about 10% slower than Chez Scheme. The cost you pay for this performance is a rather significant warmup time for many benchmarks.

As for libraries, the only major feature that Pycket does not support is Racket's FFI, most built in functions can be implemented pretty easily if missing.

Much of the data in that repo is old/outdated. This (https://github.com/pycket/pycket-bench/blob/master/output/20...) figure was the one used in the paper, which includes Gambit.