Request Details

Route
/api_complex GET
Timestamp
Sep 12, 2026 12:03 AM
Duration
130.65 ms
Status
204
Response Size
70 KB
Error
No

Performance Breakdown

Database
16.5% (7 queries)
View Rendering
8.3%
Application Logic
75.1%
Other Operations
0.0%
Total Operations
13
Slowest Operation
130.65 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 173.9ms 347.8ms 521.7ms 695.6ms

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 posts WHERE created_at > ? 9 ms 6.9%
home#api_complex 131 ms 100.0%
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... 13 ms 10.0%
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... 10 ms 7.7%
home#api_complex 131 ms 100.0%
posts/show 32 ms 24.5%
posts/show 26 ms 19.9%
SELECT * FROM posts WHERE created_at > ? 34 ms 26.0%
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... 2 ms 1.5%
home#api_complex 131 ms 100.0%
home#api_complex 131 ms 100.0%
SELECT * FROM users WHERE id = ? 32 ms 24.5%
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... 15 ms 11.5%