[PathList] Use Dir.glob instead of Find.find for speed

[FileReferencesInstaller] Do not refresh local pods

lib/cocoapods/installer/xcode/pods_project_generator/file_references_installer.rb

@@ -65,7 +65,10 @@ def install!
           # @return [void]
           #
           def refresh_file_accessors
-            file_accessors.map(&:path_list).uniq.each(&:read_file_system)
+            file_accessors.reject do |file_accessor|
+              pod_name = file_accessor.spec.name
+              sandbox.local?(pod_name)
+            end.map(&:path_list).uniq.each(&:read_file_system)
           end
 
           # Prepares the main groups to which all files will be added for the respective target

lib/cocoapods/sandbox/path_list.rb

@@ -51,12 +51,14 @@ def read_file_system
         unless root.exist?
           raise Informative, "Attempt to read non existent folder `#{root}`."
         end
-
         dirs = []
         files = []
         root_length = root.cleanpath.to_s.length + File::SEPARATOR.length
-        Find.find(root.to_s) do |f|
+        Dir.glob(root + '**/*', File::FNM_DOTMATCH).each do |f|
           directory = File.directory?(f)
+          # Ignore `.` and `..` directories
+          next if directory && f =~ /\.\.?$/
+
           f = f.slice(root_length, f.length - root_length)
           next if f.nil?