Request Details

Route
/api_complex GET
Timestamp
Sep 24, 2026 12:04 AM
Duration
155.02 ms
Status
201
Response Size
63 KB
Error
No

Performance Breakdown

Database
8.8% (6 queries)
View Rendering
13.9%
Application Logic
77.3%
Other Operations
0.0%
Total Operations
19
Slowest Operation
155.02 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 300.8ms 601.6ms 902.4ms 1203.1ms

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
home/index 11 ms 7.1%
posts/show 25 ms 16.1%
users/index 13 ms 8.4%
home/index 39 ms 25.2%
home#api_complex 155 ms 100.0%
home#api_complex 155 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... 18 ms 11.6%
layouts/application 37 ms 23.9%
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... 8 ms 5.2%
home#api_complex 155 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... 24 ms 15.5%
SELECT id, name, email FROM users WHERE id = ? 27 ms 17.4%
home#api_complex 155 ms 100.0%
home#api_complex 155 ms 100.0%
SELECT id, name FROM users WHERE email = ? 15 ms 9.7%
home/index 5 ms 3.2%
home#api_complex 155 ms 100.0%
posts/show 37 ms 23.9%
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... 14 ms 9.0%