gistfile1.rbx

GC::Profiler.clear

GC::Profiler.enable
a = Array.new(100000){ 'aa' }
puts GC::Profiler.result

__END__

GC 5 invokes.
Index    Invoke Time(sec)       Use Size(byte)     Total Size(byte)         Total Object                    GC Time(ms)
    1               0.013               314280               360448                18018         0.74199999999999954881
    2               0.018               605580               622592                31122         0.99499999999999932943
    3               0.025              1080320              1097728                54873         1.95299999999999984723
    4               0.037              1931460              1949696                97461         2.89600000000000257216