Ruby's bin men

Saturday, 30 June 12

Ruby’s bin men Elise Huard Saturday, 30 June 12

Garbage collection? Saturday, 30 June 12

Automatic Dynamic Memory Management Saturday, 30 June 12

space leaks + dangling pointers abstraction Saturday, 30 June 12

Overhead: trade-offs Saturday, 30 June 12

Ruby: all in the heap Saturday, 30 June 12

Rails? Saturday, 30 June 12

I am the smallest rails app! Here is my source
code: %w(action_controller/railtie coderay).map &method(:require) run TheSmallestRailsApp ||= Class.new(Rails::Application) { config.secret_token = routes.append { root to: 'hello#world' }.inspect initialize! } class HelloController < ActionController::Base def world render inline: " <!DOCTYPE html> <title>The Smallest Rails App</title> <h3>I am the smallest rails app!</h3> <p>Here is my source code:</p> #{CodeRay.scan_file(__FILE__, :ruby).div(line_numbers: :table)} <a href='https://github.com/artemave/thesmallestrailsapp.com'>Make me smaller</a> " end end Make me smaller https://github.com/artemave/thesmallestrailsapp.com The smallest Rails app Saturday, 30 June 12

The smallest Rails app {:TOTAL=>351159, :FREE=>-8392, :T_OBJECT=>218, :T_CLASS=>894, :T_MODULE=>138, :T_FLOAT=>20,
:T_STRING=>219091 :T_REGEXP=>489 :T_ARRAY=>22848 :T_HASH=>4896 :T_STRUCT=>76 :T_BIGNUM=>66 :T_FILE=>330 :T_DATA=>7502, :T_MATCH=>651, :T_COMPLEX=>0, :T_RATIONAL=>57, :T_NODE=>102163, :T_ICLASS=>112} Saturday, 30 June 12

MRI Ruby 1.8 Saturday, 30 June 12

Conservative Mark-and-sweep stop-the-world Saturday, 30 June 12

Garbage Collection Allocation Saturday, 30 June 12

Normal object allocation Object.new GC Saturday, 30 June 12

Hi, I want some memory Normal object allocation Object.new GC

here’s your pointer if the heap Saturday, 30 June 12

obj = (VALUE)objspace- >heap.free_slots->freelist; Saturday, 30 June 12

Normal object allocation Object.new GC obj = (VALUE)objspace- >heap.free_slots->freelist; Saturday,
30 June 12

Normal object allocation Object.new GC obj = (VALUE)objspace- >heap.free_slots->freelist; Thanks

Mark Heap GC Object.new Saturday, 30 June 12

Mark Hi, I want some memory Heap GC Object.new Saturday,
30 June 12

Mark Hi, I want some memory let me check ...
Heap GC Object.new Saturday, 30 June 12

Heap GC Object.new M Saturday, 30 June 12

Heap GC Object.new M M Saturday, 30 June 12

Heap GC Object.new M M M Saturday, 30 June 12

Heap GC Object.new M M M M Saturday, 30 June 12

Mark Heap GC Object.new M M M M Saturday, 30
June 12

Mark Heap GC Object.new Oh dear, there’s not that much
space left M M M M Saturday, 30 June 12

Sweep Heap GC Object.new M M M M Saturday, 30
June 12

Sweep Heap freelist GC Object.new M M M M Saturday,
30 June 12

Sweep here’s what’s left Heap freelist GC Object.new M M
M M Saturday, 30 June 12

Sweep here’s what’s left Heap freelist obj = (VALUE)objspace- >heap.free_slots->freelist;
GC Object.new M M M M Saturday, 30 June 12

Stop the world Saturday, 30 June 12

Ruby 1.9 Saturday, 30 June 12

Lazy sweep Heap GC Object.new M M M M Saturday,
30 June 12

Lazy sweep Heap hello, I need memory GC Object.new M
M M M Saturday, 30 June 12

Lazy sweep here’s the next free slot Heap freelist hello,
I need memory GC Object.new M M M M Saturday, 30 June 12

RUBY_GC_MALLOC_LIMIT RUBY_HEAP_MIN_SLOTS RUBY_FREE_MIN Tune with environment variables Saturday, 30 June
12

Tune with environment Saturday, 30 June 12

Aside: REE Saturday, 30 June 12

Bitmap Marking Heap M M M Saturday, 30 June 12

Bitmap Marking Heap M M M 0 0 1 1
0 0 1 0 0 Bitmap Saturday, 30 June 12

Bitmap Marking Heap 0 0 1 1 0 0 1
0 0 Bitmap Saturday, 30 June 12

Bitmap Marking Heap 0 0 1 1 0 0 1
0 0 Bitmap copy on write friendly! Saturday, 30 June 12

Ruby 2.0 Saturday, 30 June 12

Parallel marking Saturday, 30 June 12

Rubinius Saturday, 30 June 12

• Nursery • Young generation • Mature generation • (Large
objects) Generational GC Saturday, 30 June 12

Aside: kiji Saturday, 30 June 12

JRuby Saturday, 30 June 12

• Generational: • Young (eden - Survivor1 - Survivor2) •
Tenured • Permanent Area • minor/major garbage collection JVM Saturday, 30 June 12

MacRuby & RubyMotion Saturday, 30 June 12

Tools Saturday, 30 June 12

Perftools.rb Saturday, 30 June 12

Total: 28 samples 4 14.3% 14.3% 4 14.3% garbage_collector 2
7.1% 21.4% 2 7.1% ActionView::Context#_prepare_context 2 7.1% 28.6% 2 7.1% ActionView::Renderer#_template_renderer 2 7.1% 35.7% 3 10.7% CodeRay::Scanners::Ruby#scan_tokens 2 7.1% 42.9% 2 7.1% Kernel#require 2 7.1% 50.0% 3 10.7% Module#encoder 2 7.1% 57.1% 2 7.1% String#scan 1 3.6% 60.7% 1 3.6% AbstractController::Rendering#view_renderer 1 3.6% 64.3% 2 7.1% AbstractController::ViewPaths#lookup_context CPU Saturday, 30 June 12

Total: 42960 samples 6544 15.2% 15.2% 6665 15.5% Kernel#require 3781
8.8% 24.0% 6439 15.0% Module#encoder 3539 8.2% 32.3% 5997 14.0% CodeRay::Scanners::Ruby#scan_tokens 2860 6.7% 38.9% 4996 11.6% String#scan 2743 6.4% 45.3% 3319 7.7% CodeRay::Encoders::HTML#ﬁnish 2645 6.2% 51.5% 3604 8.4% AbstractController::ViewPaths#lookup_context 2382 5.5% 57.0% 22608 52.6% CodeRay::Encoders::Encoder#encode 2156 5.0% 62.0% 2837 6.6% ActionView::Renderer#_template_renderer 1815 4.2% 66.3% 7685 17.9% CodeRay::Encoders::HTML#setup 1090 2.5% 68.8% 1159 2.7% ActionView::Context#_prepare_context 1078 2.5% 71.3% 1079 2.5% Module#module_eval 983 2.3% 73.6% 1069 2.5% Module#instrumenter Object allocation Saturday, 30 June 12

Debugging Saturday, 30 June 12

#define GC_PROFILE_MORE_DETAIL 1 ... #define GC_NOTICE 1 22 GC during
init with default ruby 1.9.3-rc1 Saturday, 30 June 12

Dtrace Saturday, 30 June 12

http://tenderlovemaking.com/2011/06/29/i-want-dtrace-probes-in-ruby.html Dtrace and Instruments Saturday, 30 June 12

symbols class variables global variables huge data structures kept in
memory “Leaking references” To avoid Saturday, 30 June 12

• READ TEH CODES • read this: • (recent publications
on garbage collection) To know more Saturday, 30 June 12

Thank you @elise_huard Saturday, 30 June 12

Ruby's bin men

Ruby's bin men

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