Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 9:28 AM
Duration
211.26 ms
Status
400
Response Size
923 Bytes
Error
No

Performance Breakdown

Database
14.1% (5 queries)
View Rendering
19.9%
Application Logic
66.1%
Other Operations
0.0%
Total Operations
11
Slowest Operation
211.26 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 159.9ms 319.8ms 479.6ms 639.5ms

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
DELETE FROM comments WHERE created_at < ? 23 ms 10.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 9.5%
SELECT * FROM users WHERE id = ? 27 ms 12.8%
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 5.2%
SELECT name FROM users 9 ms 4.3%
home/index 34 ms 16.1%
home#api_complex 211 ms 100.0%
users/index 37 ms 17.5%
posts/show 36 ms 17.0%
home#api_complex 211 ms 100.0%
home/index 20 ms 9.5%