Request Details

Route
/api_complex GET
Timestamp
Sep 09, 2026 4:20 PM
Duration
172.38 ms
Status
200
Response Size
21 KB
Error
No

Performance Breakdown

Database
10.6% (5 queries)
View Rendering
12.6%
Application Logic
76.8%
Other Operations
0.0%
Total Operations
15
Slowest Operation
172.38 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 224.4ms 448.8ms 673.1ms 897.5ms

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
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... 18 ms 10.4%
posts/show 6 ms 3.5%
users/index 13 ms 7.5%
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... 12 ms 7.0%
home#api_complex 172 ms 100.0%
home#api_complex 172 ms 100.0%
posts/show 30 ms 17.4%
SELECT COUNT(*) FROM comments WHERE post_id = ? 22 ms 12.8%
SELECT name FROM users 16 ms 9.3%
posts/show 30 ms 17.4%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 27 ms 15.7%
layouts/application 13 ms 7.5%
home/index 21 ms 12.2%
home#api_complex 172 ms 100.0%
home#api_complex 172 ms 100.0%