Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 6:29 PM
Duration
339.58 ms
Status
201
Response Size
100 KB
Error
No

Performance Breakdown

Database
5.9% (10 queries)
View Rendering
6.1%
Application Logic
88.0%
Other Operations
0.0%
Total Operations
25
Slowest Operation
339.58 ms

Request Trace

How to read this

Each row is a layer of your stack. Many short Database bars means N+1 queries — fix with includes(). A wide Action bar with little Database time means slow Ruby code. A wide View bar usually means a partial rendered in a loop.

Action
View
Database
Other
Action
View
Database
0.0ms 771.9ms 1543.8ms 2315.7ms 3087.6ms

Operations

How to use this

Sort by Impact to find your biggest wins. Click any row for details and optimisation suggestions. The same SQL appearing multiple times is an N+1 — fix with includes(). A single operation above 50% impact is your highest priority.

Operation Duration Impact Timeline Actions
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 23 ms 6.8%
home#slow 340 ms 100.0%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 1 ms 0.3%
home#slow 340 ms 100.0%
users/index 33 ms 9.7%
SELECT name FROM users 21 ms 6.2%
home#slow 340 ms 100.0%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 3 ms 0.9%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 34 ms 10.0%
home#slow 340 ms 100.0%
home/index 40 ms 11.8%
users/index 37 ms 10.9%
SELECT * FROM posts WHERE created_at > ? 13 ms 3.8%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 25 ms 7.4%
SELECT * FROM posts WHERE created_at > ? 16 ms 4.7%
home#slow 340 ms 100.0%
home#slow 340 ms 100.0%
home#slow 340 ms 100.0%
users/index 37 ms 10.9%
home#slow 340 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 14 ms 4.1%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 33 ms 9.7%
posts/show 15 ms 4.4%
users/index 9 ms 2.7%
posts/show 17 ms 5.0%