Request Details

Route
/slow GET
Timestamp
Sep 20, 2026 11:09 PM
Duration
284.68 ms
Status
201
Response Size
120 KB
Error
No

Performance Breakdown

Database
4.0% (6 queries)
View Rendering
11.8%
Application Logic
84.3%
Other Operations
0.0%
Total Operations
24
Slowest Operation
284.68 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 591.2ms 1182.4ms 1773.6ms 2364.8ms

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
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... 22 ms 7.7%
users/index 8 ms 2.8%
users/index 33 ms 11.6%
home/index 32 ms 11.2%
home#slow 285 ms 100.0%
home/index 32 ms 11.2%
home/index 31 ms 10.9%
users/index 6 ms 2.1%
home#slow 285 ms 100.0%
home/index 36 ms 12.6%
layouts/application 19 ms 6.7%
home#slow 285 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 14 ms 4.9%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 10 ms 3.5%
home#slow 285 ms 100.0%
home#slow 285 ms 100.0%
home/index 22 ms 7.7%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 34 ms 11.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 1 ms 0.4%
SELECT * FROM users WHERE id = ? 13 ms 4.6%
home/index 26 ms 9.1%
home#slow 285 ms 100.0%
home#slow 285 ms 100.0%
layouts/application 33 ms 11.6%