Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 9:38 PM
Duration
250.71 ms
Status
200
Response Size
48 KB
Error
No

Performance Breakdown

Database
8.5% (6 queries)
View Rendering
12.8%
Application Logic
78.7%
Other Operations
0.0%
Total Operations
20
Slowest Operation
250.71 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 398.4ms 796.8ms 1195.2ms 1593.6ms

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 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 > ? 31 ms 12.4%
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... 27 ms 10.8%
layouts/application 17 ms 6.8%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 12.8%
home#api_complex 251 ms 100.0%
home#api_complex 251 ms 100.0%
layouts/application 35 ms 14.0%
home#api_complex 251 ms 100.0%
home/index 13 ms 5.2%
users/index 18 ms 7.2%
layouts/application 36 ms 14.4%
SELECT name FROM users 18 ms 7.2%
home#api_complex 251 ms 100.0%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 20 ms 8.0%
home/index 8 ms 3.2%
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... 8 ms 3.2%
home/index 31 ms 12.4%
home/index 38 ms 15.2%
layouts/application 8 ms 3.2%
home#api_complex 251 ms 100.0%