3/8/2009
  Before:
    Table::render
      26.1792
      16.67
      18.9697
      28.6328
       1.86553
       0.00044
       0.000319
      ---------
      92.317989

  After Table::optimize removed:
    Table::render
       0.146177
       0.145928
       0.184444
       0.014784
       0.000512
       0.000267
      ---------
       0.492112

  Speedup:
      92.317989 / 0.492112 = 187.6

3/8/2009
  New benchmark:
    1..4
    ok 1 - Created bench.rc
    # start=1236565862
    # 1000 tasks added in 3 seconds
    # 600 tasks altered in 28 seconds
    # stop=1236566048
    # total=186
    ok 2 - Removed pending.data
    ok 3 - Removed completed.data
    ok 4 - Removed bench.rc