Some benchmarks on my i5:

Code
mess x1turbo40 -bench 10
before
Average speed: 216.58% (9 seconds)
after
Average speed: 314.26% (9 seconds)

mess smc777 -bench 10
before
Average speed: 176.45% (9 seconds)
after
Average speed: 628.74% (9 seconds)

mess mz2500 -bench 10
before
Average speed: 229.45% (9 seconds)
after
Average speed: 310.79% (9 seconds)

mess pc8801mk2sr -bench 10
before
Average speed: 121.99% (9 seconds)
after 
Average speed: 238.85% (9 seconds)

Guess you got the idea.