diff --git a/lib/bundler/cli.rb b/lib/bundler/cli.rb
index 8c4888b0058..d0dae92dd24 100644
--- a/lib/bundler/cli.rb
+++ b/lib/bundler/cli.rb
@@ -439,6 +439,13 @@ def console(group = nil)
       require 'irb'
       IRB.start
     end
+    
+    desc "benchmark [GROUP]", "Displays the time taken for each each gem to be loaded into the environment"
+    def benchmark(group = nil)
+      Bundler.ui.debug!
+      Bundler.ui.debug "Gem require times as included by bundle:"
+      group ? Bundler.require(:default, *(group.split.map! {|g| g.to_sym })) : Bundler.require
+    end
 
     desc "version", "Prints the bundler's version information"
     def version
diff --git a/lib/bundler/runtime.rb b/lib/bundler/runtime.rb
index 5761694a9ef..832b8c8479b 100644
--- a/lib/bundler/runtime.rb
+++ b/lib/bundler/runtime.rb
@@ -64,8 +64,10 @@ def require(*groups)
           # dependency. If there are none, use the dependency's name
           # as the autorequire.
           Array(dep.autorequire || dep.name).each do |file|
+            start = Time.now.to_f if Bundler.ui.debugging?
             required_file = file
             Kernel.require file
+            Bundler.ui.debug "  * #{file} (#{((Time.now.to_f-start)*1000.0).round} ms)" if Bundler.ui.debugging?
           end
         rescue LoadError => e
           REGEXPS.find { |r| r =~ e.message }
diff --git a/lib/bundler/ui.rb b/lib/bundler/ui.rb
index c483216aaf7..620629190c8 100644
--- a/lib/bundler/ui.rb
+++ b/lib/bundler/ui.rb
@@ -16,6 +16,10 @@ def info(message)
 
     def confirm(message)
     end
+    
+    def debugging?
+      false
+    end
 
     class Shell < UI
       attr_writer :shell
@@ -27,7 +31,11 @@ def initialize(shell)
       end
 
       def debug(msg)
-        @shell.say(msg) if @debug && !@quiet
+        @shell.say(msg) if debugging?
+      end
+      
+      def debugging?
+        @debug && !@quiet
       end
 
       def info(msg)
diff --git a/spec/other/benchmark_spec.rb b/spec/other/benchmark_spec.rb
new file mode 100644
index 00000000000..139f1a9b752
--- /dev/null
+++ b/spec/other/benchmark_spec.rb
@@ -0,0 +1,16 @@
+require "spec_helper"
+
+describe "bundle benchmark" do
+  before :each do
+    install_gemfile <<-G
+      source "file://#{gem_repo1}"
+      gem "rails"
+    G
+  end
+
+  it "prints out the require times for each gem" do
+    bundle :benchmark
+    
+    out.should =~ / \* rails \(\d+ ms\)/
+  end
+end