mirror of
https://github.com/funamitech/mastodon
synced 2024-12-12 05:39:02 +09:00
d9ae3db8d5
Express follow_recommendations in terms of account_summaries rather than accounts, integrate filters that are unconditionally used, and materialize the resulting view. This should result in the bulk of the computation being performed only once instead of **once per recommendation language**.
63 lines
1.8 KiB
Ruby
63 lines
1.8 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class Scheduler::FollowRecommendationsScheduler
|
|
include Sidekiq::Worker
|
|
include Redisable
|
|
|
|
sidekiq_options retry: 0
|
|
|
|
# The maximum number of accounts that can be requested in one page from the
|
|
# API is 80, and the suggestions API does not allow pagination. This number
|
|
# leaves some room for accounts being filtered during live access
|
|
SET_SIZE = 100
|
|
|
|
def perform
|
|
# Maintaining a materialized view speeds-up subsequent queries significantly
|
|
AccountSummary.refresh
|
|
FollowRecommendation.refresh
|
|
|
|
fallback_recommendations = FollowRecommendation.limit(SET_SIZE).index_by(&:account_id)
|
|
|
|
I18n.available_locales.each do |locale|
|
|
recommendations = begin
|
|
if AccountSummary.safe.filtered.localized(locale).exists? # We can skip the work if no accounts with that language exist
|
|
FollowRecommendation.localized(locale).limit(SET_SIZE).index_by(&:account_id)
|
|
else
|
|
{}
|
|
end
|
|
end
|
|
|
|
# Use language-agnostic results if there are not enough language-specific ones
|
|
missing = SET_SIZE - recommendations.keys.size
|
|
|
|
if missing.positive?
|
|
added = 0
|
|
|
|
# Avoid duplicate results
|
|
fallback_recommendations.each_value do |recommendation|
|
|
next if recommendations.key?(recommendation.account_id)
|
|
|
|
recommendations[recommendation.account_id] = recommendation
|
|
added += 1
|
|
|
|
break if added >= missing
|
|
end
|
|
end
|
|
|
|
redis.pipelined do
|
|
redis.del(key(locale))
|
|
|
|
recommendations.each_value do |recommendation|
|
|
redis.zadd(key(locale), recommendation.rank, recommendation.account_id)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def key(locale)
|
|
"follow_recommendations:#{locale}"
|
|
end
|
|
end
|