Benchmark: timing 10 iterations of matchamp, matchpar...
  matchamp: 24 wallclock secs (23.48 usr +  0.00 sys = 23.48 CPU) @  0.43/s (n=10)
  matchpar: 26 wallclock secs (25.70 usr +  0.00 sys = 25.70 CPU) @  0.39/s (n=10)