Merge pull request #9712 from nobu/cache-expanded-base-path

Avoid repeated base path expansion

Author: hsbt

lib/rubygems/util.rb

@@ -81,7 +81,10 @@ def self.traverse_parents(directory, &block)
   # +base_path+ are not treated as part of the pattern.
 
   def self.glob_files_in_dir(glob, base_path)
-    Dir.glob(glob, base: base_path).map! {|f| File.expand_path(f, base_path) }
+    expanded_path = nil
+    Dir.glob(glob, base: base_path).map! do |f|
+      File.expand_path(f, expanded_path ||= File.expand_path(base_path))
+    end
   end
 
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