diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index bdbaf1738..860e4ca30 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -1724,7 +1724,7 @@ class UsersController < ApplicationController
       end
     end
     
-    @user_activities = UserActivity.where("#{sql}").order('updated_at desc').limit(10).offset(@page * 10)
+    @user_activities = UserActivity.where("#{sql}").order('updated_at desc').limit(5).offset(@page * 5)
     @type = params[:type]
     respond_to do |format|
       format.js
diff --git a/app/views/layouts/_course_base_info.html.erb b/app/views/layouts/_course_base_info.html.erb
index 469382b48..6428aa5fa 100644
--- a/app/views/layouts/_course_base_info.html.erb
+++ b/app/views/layouts/_course_base_info.html.erb
@@ -59,7 +59,7 @@
 </div>
 <% end %>
 <div class="sy_class_info fl ml15">
-  <% cache [:course_righthead,@course.id.to_s] do%>
+  <% cache [:course_righthead,@course.id.to_s+"-"+@course.updated_at.to_i.to_s] do%>
       <div  class="sy_class_titbox">
         <h3 class="fl sy_class_title">
           <%= link_to @course.syllabus.title, syllabus_path(@course.syllabus_id), :class =>'c_dark', :target => '_blank'%>
diff --git a/app/views/layouts/_user_courses.html.erb b/app/views/layouts/_user_courses.html.erb
index 60db07db0..6ccd754a1 100644
--- a/app/views/layouts/_user_courses.html.erb
+++ b/app/views/layouts/_user_courses.html.erb
@@ -1,7 +1,10 @@
 <% courses.each do |course|%>
+    <% is_teacher = User.current.logged? && (User.current.admin? || User.current.allowed_to?(:as_teacher,course)) %>
+    <% count = ShieldActivity.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>
+    <% wechat_count = ShieldWechatMessage.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>
+    <% cache [:homepage_course_info,course.id.to_s+"-"+is_teacher.to_s+"-"+(User.current == user).to_s+"-"+(User.current.member_of_course?(course)).to_s+"-"+count.to_s+"-"+wechat_count.to_s+course.updated_at.to_i.to_s] do%>
     <li>
       <span class="user_icons_class"></span>
-      <% is_teacher = User.current.logged? && (User.current.admin? || User.current.allowed_to?(:as_teacher,course)) %>
       <p href="javascript:void(0);" id="show_course_<%= course.id %>" class="course_list_menu pr" >
         <% title = "<span class='course-name'>#{course.syllabus.title}</span>".html_safe %>
         <%= link_to title, syllabus_path(course.syllabus_id), :target => '_blank', :class => 'hidden', :style => "max-width:91px; display:inline-block;"%>
@@ -16,9 +19,6 @@
       </p>
       <%#= link_to course.name+"("+current_time_and_term_short(course)+")", course_path(course.id,:host=>Setting.host_course),
                   :id => "show_course_#{course.id}", :class => 'course_list_menu hidden', :target => '_blank', :title => (course.is_public? ? "公开班级：":"私有班级：")+course.name+"（"+current_time_and_term(course)+"）"%>
-      <% count = ShieldActivity.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>
-      <% wechat_count = ShieldWechatMessage.where("container_type='User' and container_id=#{user.id} and shield_type='Course' and shield_id=#{course.id}").count %>
-
       <div class="user_navmore_box">
         <ul class="<%#= count > 0 ? 'shild shildP':'subNavArrow'%>">
           <li class="user_navmore_icons">
@@ -83,7 +83,7 @@
                     <% end %>
                   </li>
               <% end %>
-              <% if  User.current.logged? && (User.current.admin? || User.current.allowed_to?(:as_teacher,course))  %>
+              <% if  is_teacher  %>
                   <li>
                     <%= link_to course.is_public == 0 ? "设为公开" : "设为私有", {:controller => 'courses', :action => 'private_or_public', :id => course,:user_page => true},
                                 :id => "set_course_public_#{course.id.to_s}",:remote=>true, :class => 'user_navmore_li',:confirm=>"您确定要设置为"+(course.is_public == 0 ? "公开" : "私有")+"吗"%>
@@ -95,6 +95,7 @@
         </ul>
       </div>
     </li>
+    <% end %>
 <% end %>
 
 <% if all_count > (page.to_i+1) * 10%>
diff --git a/app/views/layouts/_user_projects.html.erb b/app/views/layouts/_user_projects.html.erb
index e8a7f0755..4e5a375b3 100644
--- a/app/views/layouts/_user_projects.html.erb
+++ b/app/views/layouts/_user_projects.html.erb
@@ -1,9 +1,15 @@
 <% projects.each do |project|%>
+    <% count = ShieldActivity.where("container_type='User' and container_id=#{user.id} and shield_type='Project' and shield_id=#{project.id}").count %>
+    <% wechat_count = ShieldWechatMessage.where("container_type='User' and container_id=#{user.id} and shield_type='Project' and shield_id=#{project.id}").count %>
+    <% is_logged = User.current.logged? %>
+    <% is_admin = User.current.admin? %>
+    <% current_user_isuser = User.current == @user %>
+    <% can_setting = User.current.allowed_to?({:controller => 'projects', :action => 'settings'}, project) %>
+    <% is_manager = is_project_manager?(User.current,project) %>
+    <% cache [:homepage_project_info,project.id.to_s+"-"+is_logged.to_s+"-"+is_admin.to_s+"-"+current_user_isuser.to_s+"-"+can_setting.to_s+"-"+count.to_s+"-"+wechat_count.to_s+"-"+is_manager.to_s+"-"+project.updated_on.to_i.to_s] do%>
     <li>
       <span class="user_icons_class"></span>
-      <% count = ShieldActivity.where("container_type='User' and container_id=#{user.id} and shield_type='Project' and shield_id=#{project.id}").count %>
       <%= link_to project.name, project_path(project.id,:host=>Setting.host_name), :target => '_blank', :class => "project_list_menu hidden",:id => "show_project_#{project.id}", :title => (project.is_public? ? "公开项目：":"私有项目：") + project.name%>
-
       <div class="user_navmore_box">
         <ul class="<%#= count > 0 ? 'shild shildP':'subNavArrow'%>">
           <li class="user_navmore_icons">
@@ -32,7 +38,7 @@
                     <div class="cl"></div>
                   </li>
                   <li>
-                    <% if ShieldActivity.where("container_type='User' and container_id=#{user.id} and shield_type='Project' and shield_id=#{project.id}").count == 0 %>
+                    <% if count == 0 %>
                         <%= link_to "屏蔽动态", shield_activities_path(:user_id => user.id, :project_id => project.id), :method => 'post',:remote => true,:class => "user_navmore_li" %>
                     <% else %>
                         <%= link_to "显示动态", show_acts_shield_activities_path(:user_id => user.id, :project_id => project.id),:method => 'delete',:remote => true,:class => "user_navmore_li" %>
@@ -40,7 +46,7 @@
                     <div class="cl"></div>
                   </li>
                   <li>
-                    <% if ShieldWechatMessage.where("container_type='User' and container_id=#{user.id} and shield_type='Project' and shield_id=#{project.id}").count == 0 %>
+                    <% if wechat_count == 0 %>
                         <%= link_to "屏蔽微信消息", shield_wechat_messages_path(:user_id => user.id, :project_id => project.id), :method => 'post',:remote => true,:class => "user_navmore_li" %>
                     <% else %>
                         <%= link_to "接收微信消息", show_messages_shield_wechat_messages_path(:user_id => user.id, :project_id => project.id),:method => 'delete',:remote => true,:class => "user_navmore_li" %>
@@ -60,6 +66,7 @@
         </ul>
       </div>
     </li>
+    <% end %>
 <% end %>
 
 <% if all_count > (page.to_i+1) * 10%>
diff --git a/app/views/users/_project_issue.html.erb b/app/views/users/_project_issue.html.erb
index 5a0065f86..759571e0d 100644
--- a/app/views/users/_project_issue.html.erb
+++ b/app/views/users/_project_issue.html.erb
@@ -1,5 +1,6 @@
 <% unless activity.author.nil? %>
     <div class="resources mt10" id="user_activity_<%= user_activity_id%>">
+      <% cache [:user_projectissue_activity,activity.id.to_s+"-"+User.current.logged?.to_s+"-"+(defined?(project_id)).to_s+"-"+(defined?(user_id)).to_s+"-"+(activity.editable?).to_s+"-"+(User.current.allowed_to?(:edit_issues, activity.project)).to_s+"-"+(User.current.allowed_to?(:delete_issues, activity.project)).to_s+"-"+(User.current.allowed_to?(:add_issues, activity.project)).to_s+"-"+activity.updated_on.to_i.to_s] do%>
       <div class="homepagePostBrief">
         <div class="homepagePostPortrait">
           <%= link_to image_tag(url_to_avatar(activity.author), :width => "50", :height => "50"), user_path(activity.author_id), :alt => "用户头像" %>
@@ -95,6 +96,7 @@
         </div>
         <div class="cl"></div>
       </div>
+      <% end %>
       <div id="div_user_issue_reply_<%=user_activity_id%>">
         <%= render :partial => 'users/project_issue_reply', :locals => {:activity => activity, :user_activity_id => user_activity_id} %>
       </div>
diff --git a/app/views/users/_project_message.html.erb b/app/views/users/_project_message.html.erb
index d590b9a66..ad5a4fc23 100644
--- a/app/views/users/_project_message.html.erb
+++ b/app/views/users/_project_message.html.erb
@@ -1,4 +1,6 @@
 <div class="resources mt10" id="user_activity_<%= user_activity_id%>">
+  <% update_time = get_forge_act_message(activity, activity.class.to_s) %>
+  <% cache [:user_projectmessage_activity,activity.id.to_s+"-"+User.current.logged?.to_s+"-"+(activity.author.id == User.current.id).to_s+"-"+(activity.editable_by?(User.current)).to_s+"-"+(activity.destroyable_by?(User.current)).to_s+"-"+update_time] do%>
   <div class="homepagePostBrief">
     <div class="homepagePostPortrait">
       <%= link_to image_tag(url_to_avatar(activity.author), :width => "50", :height => "50"), user_path(activity.author_id), :alt => "用户头像" %>
@@ -29,7 +31,7 @@
         发帖时间：<%= format_time(activity.created_on) %>
       </div>
       <div class="homepagePostDate fl ml15">
-        更新时间：<%= get_forge_act_message(activity, activity.class.to_s) %>
+        更新时间：<%= update_time %>
       </div>
       <div class="cl"></div>
       <% if activity.parent_id.nil? %>
@@ -81,6 +83,7 @@
     </div>
     <div class="cl"></div>
   </div>
+  <% end %>
   <% all_comments = []%>
   <% count=get_all_children(all_comments, activity).count %>
   <%# allow_delete = (activity.user == User.current || User.current.admin? || User.current.allowed_to?(:as_teacher,activity.course)) %>
diff --git a/app/views/users/_user_activities.html.erb b/app/views/users/_user_activities.html.erb
index b97cdfcfe..3eab57256 100644
--- a/app/views/users/_user_activities.html.erb
+++ b/app/views/users/_user_activities.html.erb
@@ -106,7 +106,7 @@
         <% end %>
 <% end %>
 <%# end %>
-<% if user_activities.count == 10%>
+<% if user_activities.count == 5%>
 <!--
     <div id="show_more_activities" class="loadMore mt10 f_grey">点击展开更多<%#=link_to "", user_activities_path(@user.id,:type => type,:page => page),:id => "more_activities_link",:remote => "true",:class => "none" %></div>
 -->