Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 7:52 AM
Duration
279.72 ms
Status
200
Response Size
120 KB
Error
No

Performance Breakdown

Database
1.9% (3 queries)
View Rendering
4.8%
Application Logic
93.4%
Other Operations
0.0%
Total Operations
17
Slowest Operation
279.72 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 599.2ms 1198.4ms 1797.5ms 2396.7ms

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 > ? 21 ms 7.5%
home#slow 280 ms 100.0%
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 6.4%
home#slow 280 ms 100.0%
home#slow 280 ms 100.0%
home#slow 280 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 2.1%
users/index 38 ms 13.6%
posts/show 21 ms 7.5%
users/index 16 ms 5.7%
posts/show 23 ms 8.2%
home#slow 280 ms 100.0%
users/index 7 ms 2.5%
users/index 9 ms 3.2%
home#slow 280 ms 100.0%
home#slow 280 ms 100.0%
home#slow 280 ms 100.0%