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GC
ree-1.8.7-2011.03
-----------------
1. Set instance value to nil
-------------------- Stats for Allocate --------------------
Live Objects before: 4025
Live Objects after: 1504032
------------------------------------------------------------
---------------- Stats for Set iVal to nil -----------------
Live Objects before: 1504047
Live Objects after: 3922
------------------------------------------------------------
2. Set object reference value to nil
-------------------- Stats for Allocate --------------------
Live Objects before: 4020
Live Objects after: 1504027
------------------------------------------------------------
-------------- Stats for set to nil/other val --------------
Live Objects before: 1504061
Live Objects after: 3916
------------------------------------------------------------
ruby-1.9.3-p0
-------------
1. Set instance value to nil
-------------------- Stats for Allocate --------------------
Live Objects before: 14507
Live Objects after: 914514
------------------------------------------------------------
---------------- Stats for Set iVal to nil -----------------
Live Objects before: 914530
Live Objects after: 304665
------------------------------------------------------------
2. Stats for set to nil/other val
------------------- Stats for Allocate --------------------
Live Objects before: 14500
Live Objects after: 914507
------------------------------------------------------------
---------------- Stats for set to nil/other val ------------
Live Objects before: 914544
Live Objects after: 304667
------------------------------------------------------------
3. Do both set i_val to nil and object ref to nil(gc after each)
-------------------- Stats for Allocate --------------------
Live Objects before: 14507
Live Objects after: 914514
------------------------------------------------------------
------------------ Stats for Set iVal to nil ---------------
Live Objects before: 914530
Live Objects after: 304665
------------------------------------------------------------
-------------- Stats for set to nil/other val --------------
Live Objects before: 304681
Live Objects after: 304665
------------------------------------------------------------
def grab_stat
if RUBY_DESCRIPTION =~ /Enterprise/
ObjectSpace.live_objects
else # >= 1.9
ObjectSpace.count_objects[:TOTAL] - ObjectSpace.count_objects[:FREE]
end
end
def gc
GC.enable
GC.start
GC.disable
end
GC.disable
class Test
attr_accessor :i_val
def initialize
@i_val =[]
300_000.times do |i|
@i_val << "ruby-#{i}" * 10
end
end
def say_hello
"hello"
end
end
puts "-"* 20 + " Stats for Allocate " + "-" * 20
puts "Live Objects before: #{grab_stat}"
t = Test.new
puts "Live Objects after: #{grab_stat}"
puts "-" * 60 + "\n\n"
puts "-"* 20 + " Stats for Set iVal to nil " + "-" * 20
puts "Live Objects before: #{grab_stat}"
t.i_val = nil
gc
puts "Live Objects after: #{grab_stat}"
puts "-" * 60 + "\n\n"
puts "-"* 20 + " Stats for set to nil/other val " + "-" * 20
puts "Live Objects before: #{grab_stat}"
t = []
t = [1,2,3]
gc
puts "Live Objects after: #{grab_stat}"
puts "-" * 60 + "\n\n"
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