Request Details

Route
/slow GET
Timestamp
Sep 20, 2026 9:56 AM
Duration
418.09 ms
Status
204
Response Size
67 KB
Error
No

Performance Breakdown

Database
2.8% (7 queries)
View Rendering
3.0%
Application Logic
94.1%
Other Operations
0.0%
Total Operations
24
Slowest Operation
418.09 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 1221.3ms 2442.5ms 3663.8ms 4885.0ms

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
home#slow 418 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.5%
layouts/application 35 ms 8.4%
layouts/application 29 ms 6.9%
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... 23 ms 5.5%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
posts/show 17 ms 4.1%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 17 ms 4.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 5.0%
home#slow 418 ms 100.0%
posts/show 26 ms 6.2%
home/index 9 ms 2.2%
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... 10 ms 2.4%
home#slow 418 ms 100.0%
SELECT * FROM users WHERE id = ? 32 ms 7.7%
users/index 31 ms 7.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 34 ms 8.1%