Files
once-campfire/test/controllers/messages_caching_test.rb
T
Marcello Costagliola c761763c8c Cache boosts with their message instead of one by one
Every boost had its own fragment, nested inside the message fragment that
already holds it. With a cold cache, a read and a write per boost plus a
read_multi and a write_multi per message: a room page of 40 messages with
120 boosts takes ~410 ms instead of ~290 ms. Redis runs without persistence
(config/redis.conf), so every page is cold after a restart.

A boost touches its message, so adding or removing one rewrites the message
fragment anyway. The inner fragments only paid off when a message with many
boosts was drawn again, and there they hid a lookup per booster. The boosters
are now loaded with the boosts, one query per message.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0142qgjggdJ2KDdGk7RF9Xm9
2026-10-05 16:40:49 +02:00

75 lines
2.7 KiB
Ruby

require "test_helper"
require "active_record/testing/query_assertions"
class MessagesCachingTest < ActionDispatch::IntegrationTest
include ActiveRecord::Assertions::QueryAssertions
setup do
sign_in :david
end
test "cached pages skip presentation queries and refresh edited messages" do
with_memory_cache do
get room_messages_url(rooms(:watercooler))
assert_response :success
original = response.body
assert_no_queries_match(/action_text_rich_texts|active_storage_attachments|boosts/) do
get room_messages_url(rooms(:watercooler))
end
assert_response :success
assert_equal original, response.body
messages(:fourth).update! body: "Updated cached message"
get room_messages_url(rooms(:watercooler))
assert_response :success
assert_select "#" + dom_id(messages(:fourth)), text: /Updated cached message/
end
end
test "boosts are cached inside their message instead of one fragment each" do
with_memory_cache do
cache_keys = []
subscriber = ActiveSupport::Notifications.subscribe(/\Acache_(read|read_multi|write|write_multi)\.active_support\z/) do |*, payload|
cache_keys.concat(payload[:key].is_a?(Hash) ? payload[:key].keys : Array(payload[:key]))
end
get room_messages_url(rooms(:watercooler))
assert_response :success
assert_select "#" + dom_id(boosts(:fourth_by_bender))
assert_select "#" + dom_id(boosts(:thirteenth))
assert_empty cache_keys.grep(%r{messages/boosts/_boost})
boost = messages(:fourth).boosts.create! booster: users(:jason), content: "🎉"
get room_messages_url(rooms(:watercooler))
refreshed = response.body
Rails.cache.clear
get room_messages_url(rooms(:watercooler))
assert_equal refreshed, response.body
assert_select "##{dom_id(messages(:fourth))} ##{dom_id(boost)}", text: /🎉/
ensure
ActiveSupport::Notifications.unsubscribe(subscriber)
end
end
private
def with_memory_cache
old_cache = Rails.cache
old_collection_cache = ActionView::PartialRenderer.collection_cache
old_controller_cache = MessagesController.cache_store
old_caching = MessagesController.perform_caching
Rails.cache = ActiveSupport::Cache::MemoryStore.new
ActionView::PartialRenderer.collection_cache = Rails.cache
MessagesController.cache_store = Rails.cache
MessagesController.perform_caching = true
yield
ensure
Rails.cache = old_cache
ActionView::PartialRenderer.collection_cache = old_collection_cache
MessagesController.cache_store = old_controller_cache
MessagesController.perform_caching = old_caching
end
end