result

EL7_VMWARE :  build git:(trunk) ./ruby-trunk ../test.rb
GC 13 invokes.
Index    Invoke Time(sec)       Use Size(byte)     Total Size(byte)         Total Object                    GC Time(ms)
    1               0.048               629880              1207680                30192         1.64745600000000536056
    2               0.063               621080              1207680                30192         1.60094999999998988116
    3               0.077               781240              1207680                30192         1.96487900000003046230
    4               0.086              1064920              1207680                30192         1.22489999999997323243
    5               0.088              1071080              1207680                30192         0.41275399999995965317
    6               0.106              1758920              2154240                53856         2.38160399999991234665
    7               0.135              3014600              3851520                96288         4.32847699999988577702
    8               0.149                    0                    0                    0         1.72224600000001060174

test.rb

GC::Profiler.enable

require 'rdoc/rdoc'

puts GC::Profiler.result

GC::Profiler.disable