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我在轨控制台通过这些统计数据来Rails的时间超出预期加载页面
完成200 OK在879ms（浏览次数：57.5ms | ActiveRecord的：的3.2ms）
正如你所看到的景色加载时间和主动记录时间大约需要60ms。但相反，加载时间是879毫秒。其他800毫秒可以归于哪里？ （有时其高达2000毫秒）
完整跟踪
Started GET "/index" for 127.0.0.1 at 2017-03-17 02:10:13 +0200
Processing by HomeController#index as HTML
User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT 1 [["id", 2]]
User Exists (0.6ms) SELECT 1 AS one FROM "users" WHERE ("users"."firstname" = 'Andr' AND "users"."id" != 2 AND "users"."is_artist" = 't') LIMIT 1
User Exists (0.4ms) SELECT 1 AS one FROM "users" WHERE ("users"."cname" = 'chic' AND "users"."id" != 2 AND "users"."is_artist" = 't') LIMIT 1
User Exists (0.4ms) SELECT 1 AS one FROM "users" WHERE ("users"."email" = '[email protected]' AND "users"."id" != 2 AND "users"."is_artist" = 't') LIMIT 1
User Exists (0.4ms) SELECT 1 AS one FROM "users" WHERE ("users"."spotify_name" = 'nickelback' AND "users"."id" != 2 AND "users"."is_artist" = 't') LIMIT 1
User Exists (0.2ms) SELECT 1 AS one FROM "users" WHERE ("users"."soundcloud_link" = 'nickelback' AND "users"."id" != 2 AND "users"."is_artist" = 't') LIMIT 1
Rendered layouts/_search_bar.html.erb (0.3ms)
User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."is_artist" = $1 [["is_artist", "t"]]
Tagging Load (0.4ms) SELECT "taggings".* FROM "taggings" WHERE "taggings"."user_id" IN (1, 2)
Tag Load (0.3ms) SELECT "tags".* FROM "tags" WHERE "tags"."id" IN (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
Rendered shared/_artist_tile.html.erb (3.4ms)
Rendered shared/_artist_tile.html.erb (1.6ms)
Rendered shared/_artist_tile.html.erb (1.6ms)
Rendered home/index.html.erb within layouts/application (17.6ms)
(0.2ms) SELECT COUNT(*) FROM "collective_requests" WHERE "collective_requests"."receiver_id" = $1 AND "collective_requests"."accepted" IS NULL [["receiver_id", 2]]
CACHE (0.0ms) SELECT COUNT(*) FROM "collective_requests" WHERE "collective_requests"."receiver_id" = $1 AND "collective_requests"."accepted" IS NULL [["receiver_id", 2]]
Rendered layouts/_navlinks.html.erb (3.1ms)
Rendered layouts/_header.html.erb (4.8ms)
Rendered layouts/_footer.html.erb (1.1ms)
Completed 200 OK in 879ms (Views: 57.5ms | ActiveRecord: 3.2ms)
Rails的版本是4.2.6
