Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 1:52 PM
Duration
306.95 ms
Status
200
Response Size
150 KB
Error
No

Performance Breakdown

Database
5.8% (5 queries)
View Rendering
5.3%
Application Logic
88.9%
Other Operations
0.0%
Total Operations
15
Slowest Operation
306.95 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 518.2ms 1036.4ms 1554.5ms 2072.7ms

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 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... 21 ms 6.8%
home/index 35 ms 11.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 31 ms 10.1%
posts/show 5 ms 1.6%
home#slow 307 ms 100.0%
home#slow 307 ms 100.0%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 35 ms 11.4%
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... 32 ms 10.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 2 ms 0.7%
home/index 31 ms 10.1%
layouts/application 39 ms 12.7%
home#slow 307 ms 100.0%
home#slow 307 ms 100.0%
home#slow 307 ms 100.0%
home#slow 307 ms 100.0%