Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 3:29 PM
Duration
318.36 ms
Status
204
Response Size
77 KB
Error
No

Performance Breakdown

Database
3.8% (4 queries)
View Rendering
8.2%
Application Logic
88.1%
Other Operations
0.0%
Total Operations
17
Slowest Operation
318.36 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 451.9ms 903.9ms 1355.8ms 1807.8ms

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
layouts/application 7 ms 2.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 6.6%
layouts/application 6 ms 1.9%
home/index 9 ms 2.8%
home/index 22 ms 6.9%
layouts/application 28 ms 8.8%
home#slow 318 ms 100.0%
home#slow 318 ms 100.0%
home#slow 318 ms 100.0%
posts/show 23 ms 7.2%
home#slow 318 ms 100.0%
users/index 26 ms 8.2%
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 > ? 2 ms 0.6%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 17 ms 5.3%
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... 28 ms 8.8%
home#slow 318 ms 100.0%
home/index 27 ms 8.5%