Wow, that, and using word boundaries from tye's hint, made a significant difference!

before:

Benchmark: timing 2500 iterations of grepGen, mapGen, smartGen...
   grepGen: 23 wallclock secs (22.51 usr +  0.00 sys = 22.51 CPU) @ 11
+1.06/s (n=2500)
    mapGen: 11 wallclock secs (11.42 usr +  0.00 sys = 11.42 CPU) @ 21
+8.93/s (n=2500)
  smartGen:  1 wallclock secs ( 1.05 usr +  0.00 sys =  1.05 CPU) @ 23
+92.34/s (n=2500)

[download]

after:

Benchmark: timing 2500 iterations of grepGen, mapGen, smartGen...
   grepGen: 14 wallclock secs (13.70 usr +  0.00 sys = 13.70 CPU) @ 18
+2.52/s (n=2500)
    mapGen: 13 wallclock secs (13.57 usr +  0.00 sys = 13.57 CPU) @ 18
+4.20/s (n=2500)
  smartGen:  2 wallclock secs ( 1.19 usr +  0.00 sys =  1.19 CPU) @ 21
+07.93/s (n=2500)

[download]

That really narrowed the gap between grep and map.

In reply to Re^2: Curious find while comparing grep, map, and smart match... by dbuckhal
in thread Curious find while comparing grep, map, and smart match... by dbuckhal

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