Benchmark: running ID Field, Numeric, Refaddr, String for at least 3 CPU seconds...
  ID Field:  4 wallclock secs ( 3.43 usr +  0.03 sys =  3.46 CPU) @ 1044124.57/s (n=3612671)
   Numeric:  4 wallclock secs ( 3.34 usr +  0.04 sys =  3.38 CPU) @ 989664.50/s (n=3345066)
   Refaddr:  5 wallclock secs ( 3.08 usr +  0.03 sys =  3.11 CPU) @ 912330.23/s (n=2837347)
    String:  4 wallclock secs ( 3.09 usr +  0.04 sys =  3.13 CPU) @ 747332.27/s (n=2339150)