From c3ef5d5414ac1fee5471d7063616a4b72a408e11 Mon Sep 17 00:00:00 2001
From: alpaca-tc <alpaca-tc@alpaca.tc>
Date: Thu, 11 May 2017 03:33:32 +0900
Subject: [PATCH] Add `account_id DESC` to optimize PrecomputeFeedService
(#2967)
---
app/services/precompute_feed_service.rb | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/app/services/precompute_feed_service.rb b/app/services/precompute_feed_service.rb
index 07dcb81da..46f0057cb 100644
--- a/app/services/precompute_feed_service.rb
+++ b/app/services/precompute_feed_service.rb
@@ -6,7 +6,8 @@ class PrecomputeFeedService < BaseService
# @param [Account] account
def call(_, account)
redis.pipelined do
- Status.as_home_timeline(account).limit(FeedManager::MAX_ITEMS / 4).each do |status|
+ # NOTE: Added `id desc, account_id desc` to `ORDER BY` section to optimize query.
+ Status.as_home_timeline(account).order(account_id: :desc).limit(FeedManager::MAX_ITEMS / 4).each do |status|
next if status.direct_visibility? || FeedManager.instance.filter?(:home, status, account.id)
redis.zadd(FeedManager.instance.key(:home, account.id), status.id, status.reblog? ? status.reblog_of_id : status.id)
end
--
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