Benchmark: timing 1000 iterations of Schwartzian, Simple...
Schwartzian: 16 wallclock secs (16.39 CPU) @ 61.01/s (n=1000)
    Simple: 11 wallclock secs (10.95 CPU) @ 91.32/s (n=1000)
              Rate Schwartzian      Simple
Schwartzian 61.0/s          --        -33%
Simple      91.3/s         50%          --