# 2.4.2p198 on MBP 2017 i7

      user     system      total        real

-- YAML        size=86 delta_vsz=0 delta_rss=2092
 17.730000   0.060000  17.820000 ( 17.851288)

-- JSON        size=83 delta_vsz=0 delta_rss=4
  0.850000   0.000000   0.870000 (  0.892370)

-- Marshal     size=79 delta_vsz=0 delta_rss=0
  0.620000   0.000000   0.640000 (  0.648228)

-- MessagePack size=63 delta_vsz=128 delta_rss=828
  0.380000   0.000000   0.410000 (  0.406834)