私は現在、イベント サイトをハッキングしており、クエリの最適化やデータベースのスケーリングで問題が発生したことは一度もありません。これは、それほど多くのデータがなかったためです。イベントのフィード、特に部分 (各 _event.html.erb 内) をレンダリングするのは非常に遅く、現在フォローしているすべてのユーザーがそのイベントに参加している場所に表示されます。熱心な読み込み、インデックス作成、memcache など、パフォーマンスを改善するための多くの可能性を調べましたが、これを書き直してより高速に実行するにはどうすればよいでしょうか? ありがとうございました!
_attending.html.erb
<% if user_signed_in? %>
<% @rsvp = Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going') %>
<% if @rsvp.count == 0 %>
<%= eventcount(event) %> going.
<% elsif @rsvp.count == 1 %>
<% if eventcount(event) - 1 == 0 %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[0..0].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %> is going.
<% end %>
<% else %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[0..0].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %> and <%= eventcount(event) - 1 %> going.
<% end %>
<% end %>
<% elsif @rsvp.count == 2 %>
<% if eventcount(event) - 2 == 0 %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[0..0].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %> and
<% end %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[1..1].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %> are going.
<% end %>
<% else %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[0..0].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %>,
<% end %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[1..1].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %> and <%= eventcount(event) - 2 %> going.
<% end %>
<% end %>
<% elsif @rsvp.count == 3 %>
<% if eventcount(event) - 3 == 0 %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[0..0].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %>,
<% end %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[1..1].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %>, and
<% end %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[2..2].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %> are going.
<% end %>
<% else %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[0..0].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %>,
<% end %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[1..1].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %>,
<% end %>
<% Rsvp.where(:voter_id => current_user.following, :event_id => event.id, :status => 'going')[2..2].each do |f| %>
<%= link_to User.find(f.voter_id).name, User.find(f.voter_id).slug %> and <%= eventcount(event) - 3 %> are going.
<% end %>
<% end %>
<% end %>
<% else %>
<%= eventcount(event) %> going.
<% end %>
RSVP のスキーマ
create_table "rsvps", :force => true do |t|
t.string "status"
t.integer "event_id"
t.integer "voter_id"
t.string "voter_name"
t.string "voter_type"
t.timestamp "created_at", :null => false
t.timestamp "updated_at", :null => false
end
add_index "rsvps", ["voter_id", "voter_type", "event_id"], :name => "fk_one_rsvp_per_user_per_entity", :unique => true
add_index "rsvps", ["voter_id", "voter_type"], :name => "index_rsvps_on_voter_id_and_voter_type"
関係のスキーマ
create_table "relationships", :force => true do |t|
t.integer "follower_id"
t.integer "followed_id"
t.timestamp "created_at", :null => false
t.timestamp "updated_at", :null => false
end
add_index "relationships", ["followed_id"], :name => "index_relationships_on_followed_id"
add_index "relationships", ["follower_id"], :name => "index_relationships_on_follower_id"
ユーザーモデルの関連部分
has_many :relationships, :foreign_key => "follower_id",
:dependent => :destroy
has_many :following, :through => :relationships, :source => :followed
has_many :reverse_relationships, :foreign_key => "followed_id",
:class_name => "Relationship",
:dependent => :destroy
has_many :followers, :through => :reverse_relationships, :source => :follower