Benchmark: running Calc, Manip, each for at least 10 CPU seconds...
Calc: 12 wallclock secs (11.04 usr +  0.00 sys = 11.04 CPU) 
      @ 142935.85/s (n=1577440)
Manip:10 wallclock secs (10.56 usr +  0.00 sys = 10.56 CPU) 
      @ 104.88/s (n=1107)