From adb870a9093826b33afad8c00da098a562ff0547 Mon Sep 17 00:00:00 2001
From: Sam <sam.saffron@gmail.com>
Date: Tue, 28 Oct 2014 13:31:25 +1100
Subject: [PATCH] PERF: use handlebars rendering for user list

this shave topic list rendering on local down from 140ms to 100ms
---
 .../discourse/helpers/handlebars.js.es6         | 17 +++++++++++++++++
 .../templates/list/topic_list_item.hbs          |  2 +-
 .../discourse/templates/posters_column.raw.hbs  |  5 +++++
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 app/assets/javascripts/discourse/helpers/handlebars.js.es6
 create mode 100644 app/assets/javascripts/discourse/templates/posters_column.raw.hbs

diff --git a/app/assets/javascripts/discourse/helpers/handlebars.js.es6 b/app/assets/javascripts/discourse/helpers/handlebars.js.es6
new file mode 100644
index 00000000000..891b1ed9689
--- /dev/null
+++ b/app/assets/javascripts/discourse/helpers/handlebars.js.es6
@@ -0,0 +1,17 @@
+Handlebars.registerHelper('handlebars', function(property, options) {
+
+  var template = Em.TEMPLATES[property + ".raw"];
+  var params = options.hash;
+
+  if(params) {
+    for(var prop in params){
+      params[prop] = Em.Handlebars.get(this, params[prop]) || params[prop];
+    }
+  }
+
+  return new Handlebars.SafeString(template(params));
+});
+
+Handlebars.registerHelper('get', function(property) {
+  return Em.get(this, property);
+});
diff --git a/app/assets/javascripts/discourse/templates/list/topic_list_item.hbs b/app/assets/javascripts/discourse/templates/list/topic_list_item.hbs
index 6735b9b8c22..904c7779c48 100644
--- a/app/assets/javascripts/discourse/templates/list/topic_list_item.hbs
+++ b/app/assets/javascripts/discourse/templates/list/topic_list_item.hbs
@@ -31,7 +31,7 @@
 <td class='category'>{{bound-category-link category showParent=true}}</td>
 {{/unless}}
 
-{{view 'posters-column' posters=posters}}
+{{handlebars 'posters_column' posters=posters}}
 
 {{posts-count-column topic=model class="num" action="showTopicEntrance"}}
 <td {{bind-attr class=":num :views viewsHeat"}}>{{number views numberKey="views_long"}}</td>
diff --git a/app/assets/javascripts/discourse/templates/posters_column.raw.hbs b/app/assets/javascripts/discourse/templates/posters_column.raw.hbs
new file mode 100644
index 00000000000..b091db1aac6
--- /dev/null
+++ b/app/assets/javascripts/discourse/templates/posters_column.raw.hbs
@@ -0,0 +1,5 @@
+<td class='posters'>
+{{#each posters}}
+<a href="{{get "user.path"}}" data-user-card="{{this.user.username}}" class="{{get "extras"}}">{{avatar this usernamePath="user.username" imageSize="small"}}</a>
+{{/each}}
+</td>