Existing AR implementation
      user     system      total        real
  4.070000   0.360000   4.430000 (  5.947716)
  3.810000   0.300000   4.110000 ( 11.626515)
  4.340000   0.330000   4.670000 ( 13.439310)
  3.740000   0.290000   4.030000 ( 12.367840)
  3.890000   0.320000   4.210000 ( 12.874593)
Josh's Implementation
      user     system      total        real
  4.010000   0.310000   4.320000 (  5.824290)
  3.610000   0.310000   3.920000 ( 11.626139)
  4.210000   0.360000   4.570000 ( 13.323419)
  3.750000   0.300000   4.050000 ( 12.295464)
  3.810000   0.310000   4.120000 ( 12.837779)
Lifo's Implementation
      user     system      total        real
  4.060000   0.330000   4.390000 (  5.836021)
  3.750000   0.300000   4.050000 ( 11.517477)
  4.170000   0.330000   4.500000 ( 13.229534)
  3.750000   0.290000   4.040000 ( 12.237363)
  3.820000   0.320000   4.140000 ( 12.756585)