Benchmark Your Bundle

benchmark.rb

#!/usr/bin/env ruby

# Temporarily add this dir to your path
# export PATH=~/gists/bundle_benchmark:$PATH
# cd to any of your project and run the benchmark
# cd ~/my-project
# benchmark.rb

require 'benchmark'
require 'bundler'

REGEXPS = [
  /^no such file to load -- (.+)$/i,
  /^Missing \w+ (?:file\s*)?([^\s]+.rb)$/i,
  /^Missing API definition file in (.+)$/i,
  /^cannot load such file -- (.+)$/i,
]

def pull(dep)
  required_file = nil # Make sure var is still in scope in rescue block
  begin
    # Loop through all the specified autorequires for the
    # dependency. If there are none, use the dependency's name
    # as the autorequire.
    Array(dep.autorequire || dep.name).each do |file|
      required_file = file
      Kernel.require file
    end
  rescue LoadError => e
    if dep.autorequire.nil? && dep.name.include?('-')
      namespaced_file = nil # Make sure var is still in scope in rescue block
      begin
        namespaced_file = dep.name.gsub('-', '/')
        Kernel.require namespaced_file
      rescue LoadError
        REGEXPS.find { |r| r =~ e.message }
        raise if dep.autorequire || $1.gsub('-', '/') != namespaced_file
      end
    else
      REGEXPS.find { |r| r =~ e.message }
      raise if dep.autorequire || $1 != required_file
    end
  end
end

$VERBOSE = nil

require 'active_support/all'
require 'active_record'

Benchmark.bm do |x|
  Bundler.setup.dependencies.each do |dependency|
    x.report(dependency.name[0..20].ljust(21)) do
      begin
        pull(dependency)
      rescue TypeError, NameError
      end
    end
  end
end

Reporting.txt

gem install pru

bundle exec ruby benchmark.rb > report
cat report | pru 'split(/\s+/)' 'reject{|a| a.size != 6 }.map{|a| [a[0], a[1]] }.sort_by(&:last).reverse.map{|a| "#{a[0].ljust(21)} -> #{a[1]}"  }.join("\n")' | head -n20

haml                  -> 0.320000
prawn                 -> 0.270000
mail                  -> 0.240000
webrat                -> 0.230000
newrelic_rpm          -> 0.210000
bourne                -> 0.190000
pry                   -> 0.180000
httpclient            -> 0.150000
jira4r                -> 0.140000
after_commit          -> 0.130000
capistrano            -> 0.120000
tmail                 -> 0.120000
activemerchant        -> 0.110000
migration_tools       -> 0.100000
vpim                  -> 0.080000
nokogiri              -> 0.080000
airbrake              -> 0.080000
property_sets         -> 0.070000

Add bundle exec before ruby benchmark.rb plz

Im using bundle-exec so I dont have to worry about these things :)