A look under the hood at exactly why Bundler 1.1 is so much faster than Bundler 1.0, and how all the great teamwork by the Bundler and RubyGems.org teams has made all of our lives easier.

1. Why Bundler 1.1 will be much faster
Pat Shaughnessy
@pat_shaughnessy
http://patshaughnessy.net
http://rubysource.com

2. Don’t kill the messenger

3. (or praise)
Don’t kill the messenger

10. Fetching source index for
http://rubygems.org/

11. HTTP
Bundler 1.0 RubyGems.org
Fetching source index for
http://rubygems.org/

12. What is the “source index?”

14. What's inside "specs.4.8"?

18. What about gem
dependency information?

20. Example: bundle install with
a very simple Gemfile

22. Bundler 1.0 RubyGems.org
specs.4.8

23. Bundler 1.0 RubyGems.org
specs.4.8
Bundler 1.0 RubyGems.org
prerelease_specs.4.8

24. Bundler 1.0 RubyGems.org
specs.4.8
Bundler 1.0 RubyGems.org
prerelease_specs.4.8
Bundler 1.0 RubyGems.org
uglifier-1.0.4.gemspec

25. Bundler 1.0 RubyGems.org
specs.4.8
Bundler 1.0 RubyGems.org
prerelease_specs.4.8
Bundler 1.0 RubyGems.org
uglifier-1.0.4.gemspec
Bundler 1.0 RubyGems.org
execjs-1.2.9.gemspec

26. Bundler 1.0 RubyGems.org
specs.4.8
Bundler 1.0 RubyGems.org
prerelease_specs.4.8
Bundler 1.0 RubyGems.org
uglifier-1.0.4.gemspec
Bundler 1.0 RubyGems.org
execjs-1.2.9.gemspec
Bundler 1.0 RubyGems.org
multi_json-1.0.3.gemspec

27. etc...

28. What's the problem with this picture?

29. Bundler 1.0 downloads and parses the
entire source index - not really needed

30. One HTTP request per gem during
the bundler resolve algorithm

32. It turns out that most of the time
isn’t spent downloading

34. Running in Ruby 1.9.3, the
same iteration is a lot faster

39. Fetching metadata from
http://rubygems.org/...

40. HTTP
Bundler 1.1 RubyGems.org
Fetching metadata from
http://rubygems.org/...

42. http://rubygems.org/api/v1/dependencies?gems=...

46. Example: bundle install with
a very simple Gemfile

48. uglifier

49. uglifier
http://rubygems.org/api/v1/dependencies?gems=uglifier

50. uglifier
multi_json execjs json therubyracer
http://rubygems.org/api/v1/dependencies?gems=uglifier

51. uglifier
multi_json execjs json therubyracer
http://rubygems.org/api/v1/dependencies?
gems=multi_json,execjs,json,therubyracer

52. uglifier
multi_json execjs json therubyracer
multi_json libv8
http://rubygems.org/api/v1/dependencies?
gems=multi_json,execjs,json,therubyracer

53. uglifier
multi_json execjs json therubyracer
libv8
http://rubygems.org/api/v1/dependencies?gems=libv8

54. uglifier
multi_json execjs json therubyracer
libv8
[ Empty ]
http://rubygems.org/api/v1/dependencies?gems=libv8

58. This is faster because...

59. 3 HTTP requests, instead of many more

60. Each HTTP request was
very, very fast

61. People worked together to
make all of our lives easier!

62. Why Bundler 1.1 will be much faster
Pat Shaughnessy
@pat_shaughnessy
http://patshaughnessy.net
http://rubysource.com

63. bundle outdated
bundle outdated --pre

64. bundle clean

65. bundle install --standalone