Request Details

Route
/api_complex GET
Timestamp
Sep 12, 2026 3:22 AM
Duration
142.82 ms
Status
200
Response Size
66 KB
Error
No

Performance Breakdown

Database
18.8% (9 queries)
View Rendering
10.3%
Application Logic
70.9%
Other Operations
0.0%
Total Operations
19
Slowest Operation
142.82 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 251.8ms 503.6ms 755.3ms 1007.1ms

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
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 > ? 10 ms 7.0%
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... 33 ms 23.1%
SELECT name FROM users 34 ms 23.8%
home/index 19 ms 13.3%
SELECT * FROM users WHERE id = ? 26 ms 18.2%
home#api_complex 143 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 14 ms 9.8%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 18 ms 12.6%
SELECT * FROM users WHERE id = ? 11 ms 7.7%
layouts/application 12 ms 8.4%
home#api_complex 143 ms 100.0%
posts/show 38 ms 26.6%
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... 21 ms 14.7%
home#api_complex 143 ms 100.0%
home#api_complex 143 ms 100.0%
home#api_complex 143 ms 100.0%
users/index 29 ms 20.3%
layouts/application 6 ms 4.2%
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 > ? 22 ms 15.4%