Request Details

Route
/api_complex GET
Timestamp
Sep 15, 2026 4:18 PM
Duration
172.41 ms
Status
204
Response Size
23 KB
Error
No

Performance Breakdown

Database
8.5% (6 queries)
View Rendering
17.4%
Application Logic
74.1%
Other Operations
0.0%
Total Operations
25
Slowest Operation
172.41 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 407.2ms 814.4ms 1221.7ms 1628.9ms

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
DELETE FROM comments WHERE created_at < ? 16 ms 9.3%
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... 19 ms 11.0%
home#api_complex 172 ms 100.0%
layouts/application 14 ms 8.1%
users/index 22 ms 12.8%
SELECT * FROM users WHERE id = ? 10 ms 5.8%
SELECT name FROM users 29 ms 16.8%
home/index 40 ms 23.2%
users/index 25 ms 14.5%
home#api_complex 172 ms 100.0%
home#api_complex 172 ms 100.0%
home#api_complex 172 ms 100.0%
users/index 32 ms 18.6%
SELECT * FROM users WHERE id = ? 30 ms 17.4%
posts/show 33 ms 19.1%
users/index 23 ms 13.3%
layouts/application 25 ms 14.5%
home#api_complex 172 ms 100.0%
home/index 14 ms 8.1%
home#api_complex 172 ms 100.0%
posts/show 26 ms 15.1%
users/index 11 ms 6.4%
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... 34 ms 19.7%
home#api_complex 172 ms 100.0%
users/index 19 ms 11.0%