diff --git a/app/controllers/ec_courses_controller.rb b/app/controllers/ec_courses_controller.rb
index cec0f862..4363b0eb 100644
--- a/app/controllers/ec_courses_controller.rb
+++ b/app/controllers/ec_courses_controller.rb
@@ -347,15 +347,15 @@ class EcCoursesController < ApplicationController
   def search_courses
     user = User.where(:id => params[:user_id]).first
     if user.try(:admin?) || user.try(:business?)
-      courses = Course.where(:is_delete => 0)
+      courses = Course.where(:is_delete => 0).limit(20)
     else
       course_ids = Member.where("user_id = #{user.try(:id)} and course_id != -1").pluck(:course_id)
-      courses = Course.where(:is_delete => 0, :id => course_ids)
+      courses = Course.where(:is_delete => 0, :id => course_ids).limit(20)
     end
     if params[:search] && params[:search].strip != ""
       courses = courses.where("name like ?", "%#{params[:search].strip}%").reorder("created_at desc")
     else
-      courses = courses.reorder("created_at desc")
+      courses = courses.reorder("created_at desc").limit(20)
     end
 
     respond_to do |format|
diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index 8b3e10fa..fc7d50be 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -336,10 +336,6 @@ class PullRequestsController < ApplicationController
   def pull_request_changes
       @type = params[:type]
       @changes = @g.merge_request_changes(@project.gpid, params[:id]).try(:changes)
-
-
-
-
       @changes_count = @changes.count
       @limit = 10
       @is_remote = true