Request Details

Route
/api_complex GET
Timestamp
Sep 12, 2026 5:02 PM
Duration
148.06 ms
Status
200
Response Size
28 KB
Error
No

Performance Breakdown

Database
9.9% (10 queries)
View Rendering
6.2%
Application Logic
83.9%
Other Operations
0.0%
Total Operations
24
Slowest Operation
148.06 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 397.1ms 794.3ms 1191.4ms 1588.5ms

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
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... 14 ms 9.5%
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... 9 ms 6.1%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 12.2%
layouts/application 25 ms 16.9%
home#api_complex 148 ms 100.0%
SELECT * FROM users WHERE id = ? 32 ms 21.6%
posts/show 19 ms 12.8%
home#api_complex 148 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... 10 ms 6.8%
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 > ? 23 ms 15.5%
home#api_complex 148 ms 100.0%
layouts/application 16 ms 10.8%
home/index 18 ms 12.2%
home#api_complex 148 ms 100.0%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 13 ms 8.8%
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... 2 ms 1.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 15.5%
home#api_complex 148 ms 100.0%
home#api_complex 148 ms 100.0%
posts/show 21 ms 14.2%
home#api_complex 148 ms 100.0%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 13 ms 8.8%
home#api_complex 148 ms 100.0%
home#api_complex 148 ms 100.0%