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ohaddahan/dump vs. write memory

Created September 22, 2018 07:33
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dump vs. write memory
require 'memory_profiler'
SIZE = 10_000
def dump()
IO.pipe { |r, w| Marshal.dump('a' * SIZE, w) }
end
def write()
IO.pipe { |r, w| w.write( Marshal.dump('a' * SIZE) ) }
end
MemoryProfiler.report { dump }.pretty_print(to_file: 'report_dump.txt')
MemoryProfiler.report { write }.pretty_print(to_file: 'report_write.txt')
Raw
report_dump.txt
Total allocated: 704 bytes (7 objects)
Total retained: 80 bytes (1 objects)
allocated memory by gem
-----------------------------------
624 other
80 memory_profiler-0.9.10
allocated memory by file
-----------------------------------
624 (irb)
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
allocated memory by location
-----------------------------------
624 (irb):20
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
allocated memory by class
-----------------------------------
464 IO
120 String
80 Proc
40 Array
allocated objects by gem
-----------------------------------
6 other
1 memory_profiler-0.9.10
allocated objects by file
-----------------------------------
6 (irb)
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
allocated objects by location
-----------------------------------
6 (irb):20
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
allocated objects by class
-----------------------------------
3 String
2 IO
1 Array
1 Proc
retained memory by gem
-----------------------------------
80 memory_profiler-0.9.10
retained memory by file
-----------------------------------
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
retained memory by location
-----------------------------------
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
retained memory by class
-----------------------------------
80 Proc
retained objects by gem
-----------------------------------
1 memory_profiler-0.9.10
retained objects by file
-----------------------------------
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
retained objects by location
-----------------------------------
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
retained objects by class
-----------------------------------
1 Proc
Allocated String Report
-----------------------------------
1 ""
1 (irb):20
1 "a"
1 (irb):20
1 "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
1 (irb):20
Retained String Report
-----------------------------------
Raw
report_write.txt
Total allocated: 17168 bytes (9 objects)
Total retained: 80 bytes (1 objects)
allocated memory by gem
-----------------------------------
17088 other
80 memory_profiler-0.9.10
allocated memory by file
-----------------------------------
17088 (irb)
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
allocated memory by location
-----------------------------------
17088 (irb):24
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
allocated memory by class
-----------------------------------
16584 String
464 IO
80 Proc
40 Array
allocated objects by gem
-----------------------------------
8 other
1 memory_profiler-0.9.10
allocated objects by file
-----------------------------------
8 (irb)
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
allocated objects by location
-----------------------------------
8 (irb):24
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
allocated objects by class
-----------------------------------
5 String
2 IO
1 Array
1 Proc
retained memory by gem
-----------------------------------
80 memory_profiler-0.9.10
retained memory by file
-----------------------------------
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
retained memory by location
-----------------------------------
80 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
retained memory by class
-----------------------------------
80 Proc
retained objects by gem
-----------------------------------
1 memory_profiler-0.9.10
retained objects by file
-----------------------------------
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb
retained objects by location
-----------------------------------
1 /Users/ohaddahan/.rvm/gems/ruby-2.5.0/gems/memory_profiler-0.9.10/lib/memory_profiler/reporter.rb:68
retained objects by class
-----------------------------------
1 Proc
Allocated String Report
-----------------------------------
3 "\x04\bI\"\x02\x10'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
3 (irb):24
1 "a"
1 (irb):24
1 "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
1 (irb):24
Retained String Report
-----------------------------------
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