Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 1:23 AM
Duration
333.88 ms
Status
200
Response Size
150 KB
Error
No

Performance Breakdown

Database
6.7% (5 queries)
View Rendering
10.3%
Application Logic
83.0%
Other Operations
0.0%
Total Operations
15
Slowest Operation
333.88 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 402.1ms 804.3ms 1206.4ms 1608.5ms

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
layouts/application 13 ms 3.9%
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... 32 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... 21 ms 6.3%
layouts/application 26 ms 7.8%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
layouts/application 22 ms 6.6%
home#slow 334 ms 100.0%
home/index 37 ms 11.1%
SELECT * FROM posts WHERE created_at > ? 34 ms 10.2%
SELECT * FROM users WHERE id = ? 18 ms 5.4%
posts/show 28 ms 8.4%
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... 2 ms 0.6%
users/index 40 ms 12.0%
home#slow 334 ms 100.0%