Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 5:26 PM
Duration
146.36 ms
Status
201
Response Size
77 KB
Error
No

Performance Breakdown

Database
16.0% (5 queries)
View Rendering
25.3%
Application Logic
58.7%
Other Operations
0.0%
Total Operations
12
Slowest Operation
146.36 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 124.7ms 249.4ms 374.0ms 498.7ms

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
home#api_complex 146 ms 100.0%
layouts/application 27 ms 18.4%
users/index 15 ms 10.2%
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... 1 ms 0.7%
home#api_complex 146 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... 9 ms 6.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 14 ms 9.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 21.9%
posts/show 28 ms 19.1%
SELECT name FROM users 24 ms 16.4%
posts/show 38 ms 26.0%
layouts/application 18 ms 12.3%