Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 11:54 PM
Duration
394.03 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
2.9% (4 queries)
View Rendering
4.7%
Application Logic
92.4%
Other Operations
0.0%
Total Operations
15
Slowest Operation
394.03 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 639.8ms 1279.6ms 1919.4ms 2559.2ms

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/index 26 ms 6.6%
users/index 38 ms 9.6%
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... 34 ms 8.6%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 8 ms 2.0%
home#slow 394 ms 100.0%
home/index 14 ms 3.6%
layouts/application 28 ms 7.1%
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... 11 ms 2.8%
users/index 15 ms 3.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 5.3%
home#slow 394 ms 100.0%
home#slow 394 ms 100.0%
home#slow 394 ms 100.0%
home#slow 394 ms 100.0%
home#slow 394 ms 100.0%