Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 7:39 PM
Duration
351.98 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
3.7% (5 queries)
View Rendering
5.8%
Application Logic
90.5%
Other Operations
0.0%
Total Operations
20
Slowest Operation
351.98 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 680.7ms 1361.4ms 2042.1ms 2722.9ms

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#slow 352 ms 100.0%
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... 33 ms 9.4%
home#slow 352 ms 100.0%
home/index 14 ms 4.0%
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... 27 ms 7.7%
SELECT name FROM users 25 ms 7.1%
home#slow 352 ms 100.0%
home#slow 352 ms 100.0%
layouts/application 33 ms 9.4%
home/index 6 ms 1.7%
layouts/application 10 ms 2.8%
home#slow 352 ms 100.0%
layouts/application 24 ms 6.8%
posts/show 35 ms 9.9%
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... 7 ms 2.0%
layouts/application 24 ms 6.8%
home#slow 352 ms 100.0%
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... 10 ms 2.8%
home#slow 352 ms 100.0%
posts/show 11 ms 3.1%