Dart 3.0 got a bit faster

A few silly benchmarks to check performance differences between Dart versions.

Be aware this is not some sophisticated benchmarking. I just wanted to see those numbers and thought someone else might find those to be interesting. Also, I just wanted to see the difference between Dart versions 2.19.6 and Dart 3.0.0 and the difference between double and int types which will be also a 64-bit number on the Mac.