more speedups for browsing

app/browse.rb

@@ -87,7 +87,6 @@ def browse_sites_dataset
       site_dataset.order! :follow_count.desc, :views.desc, :updated_at.desc
     else
       params[:sort_by] = 'followers'
-      site_dataset.select_all! :sites
       site_dataset.order! :follow_count.desc, :views.desc, :updated_at.desc
   end
 

migrations/101_sites_tags_site_id_index.rb

@@ -0,0 +1,9 @@
+Sequel.migration do
+  up {
+    DB.add_index :sites_tags, :site_id
+  }
+
+  down {
+    DB.drop_index :sites_tags, :site_id
+  }
+end

models/site.rb

@@ -1297,7 +1297,8 @@ class Site < Sequel::Model
 =end
 
   def self.browse_dataset
-    dataset.where is_deleted: false, is_banned: false, is_crashing: false, site_changed: true
+    dataset.select(:id,:username,:hits,:views,:created_at,:plan_type,:parent_site_id,:domain,:score,:title).
+      where(is_deleted: false, is_banned: false, is_crashing: false, site_changed: true)
   end
 
   def suggestions(limit=SUGGESTIONS_LIMIT, offset=0)