Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 7:31 PM
Duration
184.86 ms
Status
201
Response Size
110 KB
Error
No

Performance Breakdown

Database
14.6% (8 queries)
View Rendering
2.6%
Application Logic
82.8%
Other Operations
0.0%
Total Operations
15
Slowest Operation
184.86 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 279.1ms 558.2ms 837.2ms 1116.3ms

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 posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 17.3%
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... 8 ms 4.3%
home#slow 185 ms 100.0%
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... 18 ms 9.7%
home#slow 185 ms 100.0%
home#slow 185 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 6 ms 3.2%
home#slow 185 ms 100.0%
posts/show 10 ms 5.4%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 28 ms 15.1%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 28 ms 15.1%
users/index 19 ms 10.3%
SELECT name FROM users 13 ms 7.0%
home#slow 185 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 30 ms 16.2%