Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 10:24 PM
Duration
198.11 ms
Status
204
Response Size
85 KB
Error
No

Performance Breakdown

Database
3.8% (5 queries)
View Rendering
2.1%
Application Logic
94.1%
Other Operations
0.0%
Total Operations
18
Slowest Operation
198.11 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 579.1ms 1158.1ms 1737.2ms 2316.2ms

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
home#slow 198 ms 100.0%
SELECT name FROM users 23 ms 11.6%
SELECT * FROM posts WHERE created_at > ? 13 ms 6.6%
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 > ? 11 ms 5.6%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
SELECT * FROM users WHERE id = ? 31 ms 15.6%
layouts/application 34 ms 17.2%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 11 ms 5.6%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
home#slow 198 ms 100.0%
layouts/application 14 ms 7.1%