[RubyGemsExt] Speed up Dependency#to_lockseg-spec-set-perf

1 files changed, 8 insertions, 3 deletions

diff --git a/lib/bundler/rubygems_ext.rb b/lib/bundler/rubygems_ext.rb
index 7293e7cfc7..a0f8fa848b 100644
--- a/lib/bundler/rubygems_ext.rb
+++ b/lib/bundler/rubygems_ext.rb
@@ -151,7 +151,7 @@ module Gem
 
     def to_lock
       out = String.new("  #{name}")
-      unless requirement == Gem::Requirement.default
+      unless requirement.none?
         reqs = requirement.requirements.map {|o, v| "#{o} #{v}" }.sort.reverse
         out << " (#{reqs.join(", ")})"
       end
@@ -169,11 +169,16 @@ module Gem
   end
 
   class Requirement
-    # Backport of performance enhancement added to Rubygems 1.4
+    # Backport of performance enhancement added to RubyGems 1.4
     def none?
-      @none ||= (to_s == ">= 0")
+      # note that it might be tempting to replace with with RubyGems 2.0's
+      # improved implementation. Don't. It requires `DefaultRequirement` to be
+      # defined, and more importantantly, these overrides are not used when the
+      # running RubyGems defines these methods
+      to_s == ">= 0"
     end unless allocate.respond_to?(:none?)
 
+    # Backport of performance enhancement added to RubyGems 2.2
     def exact?
       return false unless @requirements.size == 1
       @requirements[0][0] == "="