Request Details

Route
/api_complex GET
Timestamp
Sep 09, 2026 6:04 PM
Duration
240.06 ms
Status
200
Response Size
86 KB
Error
No

Performance Breakdown

Database
2.9% (5 queries)
View Rendering
4.0%
Application Logic
93.1%
Other Operations
0.0%
Total Operations
25
Slowest Operation
240.06 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 902.2ms 1804.4ms 2706.6ms 3608.8ms

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... 17 ms 7.1%
users/index 24 ms 10.0%
home#api_complex 240 ms 100.0%
home#api_complex 240 ms 100.0%
posts/show 16 ms 6.7%
home#api_complex 240 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... 30 ms 12.5%
home#api_complex 240 ms 100.0%
layouts/application 14 ms 5.8%
home#api_complex 240 ms 100.0%
home/index 35 ms 14.6%
home#api_complex 240 ms 100.0%
home#api_complex 240 ms 100.0%
home#api_complex 240 ms 100.0%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 22 ms 9.2%
users/index 26 ms 10.8%
home#api_complex 240 ms 100.0%
posts/show 30 ms 12.5%
home#api_complex 240 ms 100.0%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 33 ms 13.7%
home#api_complex 240 ms 100.0%
home#api_complex 240 ms 100.0%
home#api_complex 240 ms 100.0%
home#api_complex 240 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 1 ms 0.4%