Benchmark: timing 1000000 iterations of isspace, nospace...
   isspace: 67 wallclock secs (56.34 usr +  0.15 sys = 56.49 CPU) @ 17702.25/s (n=1000000)
   nospace: 63 wallclock secs (49.19 usr +  0.26 sys = 49.45 CPU) @ 20222.45/s (n=1000000)