Index: app/models/issue.rb
===================================================================
--- app/models/issue.rb	(リビジョン 20577)
+++ app/models/issue.rb	(作業コピー)
@@ -1743,16 +1743,16 @@
           if children.any?
             child_with_total_estimated_hours = children.select {|c| c.total_estimated_hours.to_f > 0.0}
             if child_with_total_estimated_hours.any?
-              average = child_with_total_estimated_hours.map(&:total_estimated_hours).sum.to_d / child_with_total_estimated_hours.count
+              average = child_with_total_estimated_hours.sum(&:total_estimated_hours).to_d / child_with_total_estimated_hours.count
             else
               average = 1.0.to_d
             end
-            done = children.map do |c|
+            done = children.sum do |c|
               estimated = (c.total_estimated_hours || 0.0).to_d
               estimated = average unless estimated > 0.0
               ratio = c.closed? ? 100 : (c.done_ratio || 0)
               estimated * ratio
-            end.sum
+            end
             progress = done / (average * children.count)
             p.done_ratio = progress.floor
           end
Index: app/models/project.rb
===================================================================
--- app/models/project.rb	(リビジョン 20577)
+++ app/models/project.rb	(作業コピー)
@@ -677,12 +677,12 @@
   # progress on it's versions.
   def completed_percent(options={:include_subprojects => false})
     if options.delete(:include_subprojects)
-      total = self_and_descendants.collect(&:completed_percent).sum
+      total = self_and_descendants.sum(&:completed_percent)
 
       total / self_and_descendants.count
     else
       if versions.count > 0
-        total = versions.collect(&:completed_percent).sum
+        total = versions.sum(&:completed_percent)
 
         total / versions.count
       else