Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 9:44 PM
Duration
564.69 ms
Status
200
Response Size
130 KB
Error
No

Performance Breakdown

Database
4.4% (6 queries)
View Rendering
7.1%
Application Logic
88.5%
Other Operations
0.0%
Total Operations
16
Slowest Operation
564.69 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 638.2ms 1276.4ms 1914.6ms 2552.8ms

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
posts/show 37 ms 6.6%
home/index 38 ms 6.7%
layouts/application 31 ms 5.5%
home/index 26 ms 4.6%
home#slow 565 ms 100.0%
home/index 28 ms 5.0%
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... 11 ms 1.9%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 3 ms 0.5%
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 > ? 18 ms 3.2%
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 > ? 30 ms 5.3%
home/index 22 ms 3.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 4.8%
home#slow 565 ms 100.0%
SELECT id, name FROM users WHERE email = ? 23 ms 4.1%