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Angelina Ballerina Learns about Memory Allocation Allison McMillan @allie_p

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https://www.khanacademy.org/computing/computer-programming/programming-games-visualizations/memory-game/a/intro-to-memory

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Photo: Getty Images

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BRYAN WOOLSTON / Reuters MinnPost illustration by Jaime Anderson http://www.clotureclub.com/2013/07/22-things-most-dc-people-do/

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https://www.youtube.com/watch?v=GFfGzNXnJE8

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https://digiday.com/marketing/the-new-face-of-programmatic-efficacy-over-efficiency/

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First Seek to Understand - Stephen Covey

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http://www.buzinga.com.au/buzz/app-development-jargon-glossary/

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http://blackgeekygirl.deviantart.com/art/Little-Miss-Smartypants-515026930

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Definitions Scenarios Concepts Tools

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https://www.goodreads.com/book/show/492812.Angelina_Ballerina

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http://bookinwithbingo.blogspot.com/2011/04/

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https://www.pinterest.com

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http://www.wikihow.com/Find-Your-Own-Dancing-Style

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www.pinterest.com

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https://www.pinterest.com/pin/497507090057749846/

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https://s-media-cache-ak0.pinimg.com/originals/01/69/1a/01691a66976f8e035a34990fb63e22de.jpg

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http://www.vashtie.com/culture/disneys-aladdin-still-us-dreaming-three-wishes/

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https://giphy.com/gifs/jecamartinez-ballet-ballerina-tippy-toes-yoJC2K2zjyPhKzg8lq

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http://gifsgallery.com/angelina+ballerina+gif

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https://giphy.com/gifs/loop-ballet-perfection-Ez1XmttaHzjQ4

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https://www.pinterest.com/pin/766245324070166230/

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Memory Can I have a box?

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+ Memory

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Heap Stack

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Stack Clean room Help with dinner Do a chore

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Heap

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http://code.chaoscreated.com/

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Heap Turn Position Technique

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Heap Machine Heap Ruby Heap

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Heap Dance Heap Ballet Heap

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Heap Dance Heap Ballet Heap Page Page Page

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Heap Machine Heap Ruby Heap Page Node/Slot Ruby Object

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Heap Dance Heap Ballet Heap Feet Positions Node/Slot First position Node/Slot Fourth position https://dancer.com/ballet-info/in-the-studio/terms-positions/

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Open slot

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new first open slot Bump Pointer Allocation

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Eden page Retained objects

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http://artandpractice.blogspot.nl/2013/04/huma-1315-chapter-8-dance.html new memory

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Garbage collection is a type of automatic memory management that makes a program seem like it has infinite memory by reclaiming objects that are no longer in use.

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www.youtube.com

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https://alchetron.com/John-McCarthy-(computer-scientist)-1012892-W

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http://imgur.com/gallery/btPUV

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https://giphy.com/gifs/cheezburger-funny-amazing-76D0WNoMfMOyc

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https://en.wikipedia.org/wiki/Box_Step

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http://makeagif.com/gif/stanford-viennese-ball-2013-opening-committee-waltz-cH-YJy

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Heap

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Heap

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Heap

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Object Graph Heap object Root References References Heap object Heap object

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http://classicalballetnews.com/how-to-releve-in-ballet-video/how-to-releve-in-ballet/

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Stack Clean room Help with dinner Do a chore Angelina, Clean your room

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Ballet Heap Page

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https://www.tumblr.com/search/ballet%20perfection

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Granule Chunk Lists

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Slot Slot Slot Slot

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Slot Slot Slot Slot r value

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https://speakerdeck.com/pat_shaughnessy/visualizing-garbage-collection-in-rubinius-jruby-and-ruby-2-dot-0

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“first position” class: Position Object: position1 = Position.new

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Object: position1 = Position.new Address

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Program Footprint

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https://www.pinterest.com

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Object Space

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Mutator Collector

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https://hirshhorn.si.edu/kusama/infinity-rooms/

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http://gifrific.com/baby-groot-dancing-guardians-of-the-galaxy/

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http://www.blu-ray.com/movies/screenshot.php?movieid=44938&position=5

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Root

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https://www.gutenberg.org/files/27367/27367-h/27367-h.htm Root

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Root

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https://www.americandancesportcenter.com/waltz

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http://tech.eu/features/2921/enevo-waste-management-profile/

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Root

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1 1 1 1 1 0 0 0

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1 1 1 1 1 0 0 0

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https://pixabay.com/en/playmobil-toy-garbage-collector-771313/

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FromSpace ToSpace

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FromSpace ToSpace

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Pointer FromSpace ToSpace

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FromSpace (formerly ToSpace) ToSpace

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FromSpace

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Mark Sweep Compact

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Root

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https://giphy.com/gifs/dance-black-and-white-dancing-FobM3MLsUVmnu

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https://dribbble.com/shots/3588547-Hiplet-Desigual-2

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Generation 0 Generation 1 Root

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Generation 0 Root

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Generation 0 Root

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Generation 0 Root

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Generation 1 Root

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Generation 1 Generation 0 Root

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Generation 1 Generation 0 Root

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Generation 1 Generation 0 Root

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Generation 1 Generation 0 Root

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Write barrier Generation 1 Generation 0 Root

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Generation 1 Generation 0 Root

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Dancing with the stars

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https://coderwall.com/p/yutdhq/understanding-garbage-collection-p1-2

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Root

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Root

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https://giphy.com/gifs/agentm-agent-m-Xdcj75alQutVe

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writer barrier Root

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https://www.pinterest.com/pin/470626229787955295/

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https://i2.wp.com/sassandbalderdash.com/wp-content/uploads/2014/03/letitgo7.gif

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Rails Apps Retained Memory Allocated Memory = +

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http://www.pastposters.com/details.php?prodId=4009

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2.3.1 :001 > GC.stat(:total_freed_objects) => 97198

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http://gifrific.com/uga-mens-swim-and-dive-team-harlem-shake-dance/

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{
 :count=>0,
 :heap_allocated_pages=>24,
 :heap_sorted_length=>24,
 :heap_allocatable_pages=>0,
 :heap_available_slots=>9783,
 :heap_live_slots=>7713,
 :heap_free_slots=>2070,
 :heap_final_slots=>0,
 :heap_marked_slots=>0,
 :heap_swept_slots=>0,
 :heap_eden_pages=>24,
 :heap_tomb_pages=>0,
 :total_allocated_pages=>24,
 :total_freed_pages=>0,
 :total_allocated_objects=>7796,
 :total_freed_objects=>83,
 :malloc_increase_bytes=>2389312,
 :malloc_increase_bytes_limit=>16777216,
 :minor_gc_count=>0,
 :major_gc_count=>0,
 :remembered_wb_unprotected_objects=>0,
 :remembered_wb_unprotected_objects_limit=>0,
 :old_objects=>0,
 :old_objects_limit=>0,
 :oldmalloc_increase_bytes=>2389760,
 :oldmalloc_increase_bytes_limit=>16777216
 }

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Heap Allocated Pages Pages

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Heap Sorted Length Slots

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Heap available slots Slots

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Heap live slots

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Heap Free Slots

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Heap Final Slots Root

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Total Allocated Objects Root

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Total Freed Objects Root

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2.3.1 :001 > GC.stat[:count]

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GC::Profiler.enable 10000.times do puts “angelina turns” end GC.start puts GC::Profiler.result GC::Profiler.disable

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Index 1 Invoke Time(sec) 0.075 Use Size(byte) 584120 Total Size(byte) 1207680 Total Object 30192 GC Time(ms) 1.91500000000000003553

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> ObjectSpace.each_object

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Object Space

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2.3.1 :003 > ObjectSpace.count_objects => {:TOTAL=>53805, :FREE=>7063, :T_OBJECT=>11 10, :T_CLASS=>919, :T_MODULE=>42, :T_FLOAT =>4, :T_STRING=>28307, :T_REGEXP=>195, :T_ ARRAY=>5470, :T_HASH=>180, :T_STRUCT=>3, : T_BIGNUM=>2, :T_FILE=>12, :T_DATA=>269, :T _MATCH=>130, :T_COMPLEX=>1, :T_SYMBOL=>7, :T_IMEMO=>5201, :T_NODE=>4842, :T_ICLASS=> 48}

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Derailed Benchmarks Memory_profiler Rack-mini-profiler get_process_mem

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http://harlequinblog.com/2016/08/11-signs-youre-a-book-lover-and-should-be-celebrating-national-book-lovers-day/

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https://www.emaze.com/@AWZCLQTQ/Rube-Goldberg-Machine

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Resources http://daydreamsinruby.com/ memory-resources/

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Thank you

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@allie_p allison.p.mcmillan@gmail.com www.collectiveidea.com www.daydreamsinruby.com