Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 11:26 PM
Duration
156.74 ms
Status
204
Response Size
35 KB
Error
No

Performance Breakdown

Database
4.1% (3 queries)
View Rendering
16.4%
Application Logic
79.5%
Other Operations
0.0%
Total Operations
11
Slowest Operation
156.74 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 147.8ms 295.6ms 443.4ms 591.2ms

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 * 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... 2 ms 1.3%
users/index 16 ms 10.2%
posts/show 34 ms 21.7%
home#api_complex 157 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 > ? 11 ms 7.0%
home#api_complex 157 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... 11 ms 7.0%
home#api_complex 157 ms 100.0%
users/index 7 ms 4.5%
layouts/application 20 ms 12.8%
posts/show 20 ms 12.8%