Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 6:24 PM
Duration
479.58 ms
Status
204
Response Size
140 KB
Error
No

Performance Breakdown

Database
2.1% (3 queries)
View Rendering
4.7%
Application Logic
93.2%
Other Operations
0.0%
Total Operations
15
Slowest Operation
479.58 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 771.6ms 1543.2ms 2314.9ms 3086.5ms

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 users WHERE id = ? 18 ms 3.8%
home#slow 480 ms 100.0%
home#slow 480 ms 100.0%
layouts/application 29 ms 6.0%
layouts/application 32 ms 6.7%
users/index 17 ms 3.5%
layouts/application 29 ms 6.0%
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... 13 ms 2.7%
home#slow 480 ms 100.0%
home#slow 480 ms 100.0%
posts/show 22 ms 4.6%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 33 ms 6.9%
users/index 16 ms 3.3%
home#slow 480 ms 100.0%
home#slow 480 ms 100.0%