diff --git a/Gemfile b/Gemfile
index d3581d75e..afd6a667a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,13 +3,13 @@ source 'http://rubygems.org'
 
 unless RUBY_PLATFORM =~ /w32/
   # unix-like only
-  gem 'iconv'
+  gem 'iconv'
   gem 'rubyzip'
   gem 'zip-zip'
 end
 
-gem 'grape', '~> 0.9.0'
-gem 'grape-entity'
+gem 'grape', '~> 0.9.0'
+gem 'grape-entity'
 gem 'seems_rateable', path: 'lib/seems_rateable'
 gem "rails", "3.2.13"
 gem "jquery-rails", "~> 2.0.2"
@@ -20,13 +20,12 @@ gem "builder", "3.0.0"
 gem 'acts-as-taggable-on', '2.4.1'
 gem 'spreadsheet'
 gem 'ruby-ole'
-gem 'email_verifier'
-gem 'newrelic_rpm'
+#gem 'email_verifier'
 
 group :development do
-  gem 'grape-swagger'
-  gem 'grape-swagger-ui', git: 'https://github.com/guange2015/grape-swagger-ui.git'
-  #gem 'puma'
+  gem 'grape-swagger'
+  gem 'grape-swagger-ui', git: 'https://github.com/guange2015/grape-swagger-ui.git'
+  #gem 'puma'
   gem 'better_errors', path: 'lib/better_errors'
   gem 'rack-mini-profiler', path: 'lib/rack-mini-profiler'
 end
diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index e81b57ad7..7653be94d 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -828,6 +828,7 @@ class CoursesController < ApplicationController
   end
 
   def show
+
      # try to redirect to the requested menu item
     if params[:jump] && redirect_to_course_menu_item(@course, params[:jump])
       return
@@ -866,6 +867,7 @@ class CoursesController < ApplicationController
     @activity.scope_select {|t| has["show_#{t}"]}
     # modify by nwb
     # 添加私密性判断
+
     if User.current.member_of_course?(@course)|| User.current.admin?
       events = @activity.events(@days, @course.created_at)
     else
@@ -890,14 +892,13 @@ class CoursesController < ApplicationController
     @events_by_day = events.group_by {|event| User.current.time_to_date(event.event_datetime)}
     #  documents
     @sort_by = %w(category date title author).include?(params[:sort_by]) ? params[:sort_by] : 'category'
-    #
-    @teachers= searchTeacherAndAssistant(@course)
-    @canShowRealName = isCourseTeacher(User.current.id,@course)
+    # 这写变量发现没有用而且拖慢速度
+    #@teachers= searchTeacherAndAssistant(@course)
+    #@canShowRealName = isCourseTeacher(User.current.id,@course)
 
     if(User.find_by_id(CourseInfos.find_by_course_id(@course.id).try(:user_id)))
       @user = User.find_by_id(CourseInfos.find_by_course_id(@course.id).user_id)
     end
-
     respond_to do |format|
       format.html{render :layout => 'base_courses'}
       format.api
diff --git a/config/routes.rb b/config/routes.rb
index 755ce6c29..3ad413529 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -27,7 +27,6 @@
 
 RedmineApp::Application.routes.draw do
 
-
   #match '/contests/:id/contestnotifications', :controller => 'contestnotifications', :action => 'index'
 
   mount Mobile::API => '/api'
diff --git a/lib/plugins/acts_as_activity_provider/lib/acts_as_activity_provider.rb b/lib/plugins/acts_as_activity_provider/lib/acts_as_activity_provider.rb
index f4712fa3e..35d168732 100644
--- a/lib/plugins/acts_as_activity_provider/lib/acts_as_activity_provider.rb
+++ b/lib/plugins/acts_as_activity_provider/lib/acts_as_activity_provider.rb
@@ -98,20 +98,13 @@ module Redmine
             # Author lizanle
             # Description 删除 unless scope.all，因为这个执行查询，并且没有加入时间限制，与下边 scope.all(provider_options[:find_options].dup)重复
             if options[:course]
-              if provider_options[:timestamp].include? "updated_on"
-                to = scope.scoped(:order => "#{provider_options[:timestamp]} desc").all(provider_options[:find_options].dup).first.updated_on
-              else
-                to = scope.scoped(:order => "#{provider_options[:timestamp]} desc").all(provider_options[:find_options].dup).first.created_on
-              end
-                from = (to - days.days) > created_time ? (to - days.days) : created_time.to_date
+              scope.all(provider_options[:find_options].dup)
             else
-                #from =  to - Setting.activity_days_default.to_i
-            end
-
-            if from && to
-              scope = scope.scoped(:conditions => ["#{provider_options[:timestamp]} BETWEEN ? AND ?", from, to])
+              if from && to
+                scope = scope.scoped(:conditions => ["#{provider_options[:timestamp]} BETWEEN ? AND ?", from, to])
+                scope.all(provider_options[:find_options].dup)
+              end
             end
-            scope.all(provider_options[:find_options].dup)
           end
 
           # 为了首页获取数据基本复制了上面的方法，改变了用户查看权限，增加了对讨论区的识别。