Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 4:50 PM
Duration
294.0 ms
Status
201
Response Size
170 KB
Error
No

Performance Breakdown

Database
3.7% (7 queries)
View Rendering
6.6%
Application Logic
89.7%
Other Operations
0.0%
Total Operations
22
Slowest Operation
294.0 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 655.5ms 1311.0ms 1966.5ms 2622.0ms

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 * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 16 ms 5.4%
users/index 10 ms 3.4%
home#slow 294 ms 100.0%
home#slow 294 ms 100.0%
home#slow 294 ms 100.0%
home#slow 294 ms 100.0%
home/index 16 ms 5.4%
users/index 23 ms 7.8%
home/index 22 ms 7.5%
home#slow 294 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 20 ms 6.8%
users/index 34 ms 11.6%
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... 6 ms 2.0%
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... 18 ms 6.1%
home#slow 294 ms 100.0%
users/index 34 ms 11.6%
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... 3 ms 1.0%
SELECT name FROM users 5 ms 1.7%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 28 ms 9.5%
home#slow 294 ms 100.0%
users/index 35 ms 11.9%
home#slow 294 ms 100.0%