rails runner

ruby-1.9.3-p0
        2.72 real         2.37 user         0.31 sys
  54624256  maximum resident set size
        2.69 real         2.36 user         0.31 sys
  56795136  maximum resident set size
        2.66 real         2.34 user         0.30 sys
  47902720  maximum resident set size
        2.67 real         2.34 user         0.31 sys
  53112832  maximum resident set size
        2.68 real         2.36 user         0.31 sys
  54575104  maximum resident set size

Cumulative
        2.19 real         1.85 user         0.29 sys
  38952960  maximum resident set size
        2.11 real         1.82 user         0.28 sys
  38502400  maximum resident set size
        2.21 real         1.87 user         0.28 sys
  38367232  maximum resident set size
        2.14 real         1.84 user         0.28 sys
  38567936  maximum resident set size
        2.12 real         1.83 user         0.27 sys
  38412288  maximum resident set size

Cumulative + Previous Hash Optimization
        2.03 real         1.68 user         0.30 sys
  41504768  maximum resident set size
        2.00 real         1.69 user         0.29 sys
  40001536  maximum resident set size
        1.98 real         1.67 user         0.28 sys
  40013824  maximum resident set size
        1.95 real         1.66 user         0.28 sys
  41082880  maximum resident set size
        1.96 real         1.66 user         0.28 sys
  42221568  maximum resident set size

Cumulative + New Hash Optimization
        2.05 real         1.71 user         0.29 sys
  38551552  maximum resident set size
        2.07 real         1.75 user         0.29 sys
  38670336  maximum resident set size
        2.06 real         1.74 user         0.29 sys
  38481920  maximum resident set size
        1.97 real         1.68 user         0.28 sys
  38318080  maximum resident set size
        2.09 real         1.73 user         0.28 sys
  40484864  maximum resident set size

rake test

ruby-1.9.3-p0
        9.05 real         5.68 user         0.72 sys
  72224768  maximum resident set size
        8.50 real         5.69 user         0.60 sys
  83472384  maximum resident set size
        8.39 real         5.64 user         0.58 sys
  73637888  maximum resident set size
        8.39 real         5.65 user         0.59 sys
  75169792  maximum resident set size
        8.42 real         5.72 user         0.58 sys
  74031104  maximum resident set size

Cumulative
        8.11 real         5.05 user         0.60 sys
  63565824  maximum resident set size
        7.65 real         4.98 user         0.56 sys
  64172032  maximum resident set size
        7.69 real         5.02 user         0.55 sys
  63139840  maximum resident set size
        7.72 real         5.04 user         0.56 sys
  64643072  maximum resident set size
        7.69 real         4.99 user         0.56 sys
  64442368  maximum resident set size

Cumulative + Previous Hash Optimization
        7.91 real         4.88 user         0.61 sys
  68366336  maximum resident set size
        7.77 real         4.89 user         0.59 sys
  67862528  maximum resident set size
        7.71 real         4.83 user         0.58 sys
  66953216  maximum resident set size
        7.64 real         4.86 user         0.56 sys
  66629632  maximum resident set size
        7.76 real         4.93 user         0.57 sys
  66686976  maximum resident set size

Cumulative + New Hash Optimization
        7.77 real         4.77 user         0.60 sys
  68063232  maximum resident set size
        7.56 real         4.83 user         0.57 sys
  67248128  maximum resident set size
        7.49 real         4.82 user         0.55 sys
  69808128  maximum resident set size
        7.52 real         4.81 user         0.57 sys
  68460544  maximum resident set size
        7.40 real         4.73 user         0.55 sys
  67674112  maximum resident set size