1.
Why Bundler 1.1 will be much fasterPat Shaughnessy@pat_shaughnessyhttp://patshaughnessy.nethttp://rubysource.com

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Don’t kill the messenger

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(or praise)Don’t kill the messenger

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

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HTTPBundler 1.0 RubyGems.org Fetching source index for http://rubygems.org/

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What is the “source index?”

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Whats inside "specs.4.8"?

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What about gemdependency information?

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Example: bundle install with a very simple Gemfile

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Bundler 1.0 RubyGems.org specs.4.8

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

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

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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.gemspecBundler 1.0 RubyGems.org execjs-1.2.9.gemspec

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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.gemspecBundler 1.0 RubyGems.org multi_json-1.0.3.gemspec

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etc...

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Whats the problem with this picture?

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Bundler 1.0 downloads and parses theentire source index - not really needed

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One HTTP request per gem during the bundler resolve algorithm

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

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Running in Ruby 1.9.3, thesame iteration is a lot faster

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

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HTTPBundler 1.1 RubyGems.org Fetching metadata from http://rubygems.org/...

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

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Example: bundle install with a very simple Gemfile

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uglifier

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

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uglifiermulti_json execjs json therubyracerhttp://rubygems.org/api/v1/dependencies?gems=uglifier

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

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

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

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

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This is faster because...

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3 HTTP requests, instead of many more

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Each HTTP request was very, very fast

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People worked together tomake all of our lives easier!

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Why Bundler 1.1 will be much fasterPat Shaughnessy@pat_shaughnessyhttp://patshaughnessy.nethttp://rubysource.com

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bundle outdatedbundle outdated --pre

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bundle clean

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bundle install --standalone