Request Details

Route
/api_complex GET
Timestamp
Sep 11, 2026 12:29 AM
Duration
282.17 ms
Status
201
Response Size
41 KB
Error
No

Performance Breakdown

Database
7.4% (7 queries)
View Rendering
5.0%
Application Logic
87.7%
Other Operations
0.0%
Total Operations
18
Slowest Operation
282.17 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 482.7ms 965.5ms 1448.2ms 1931.0ms

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 (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... 31 ms 11.0%
layouts/application 23 ms 8.2%
SELECT * FROM users WHERE id = ? 20 ms 7.1%
home#api_complex 282 ms 100.0%
posts/show 13 ms 4.6%
home#api_complex 282 ms 100.0%
layouts/application 15 ms 5.3%
SELECT * FROM users WHERE id = ? 32 ms 11.3%
posts/show 25 ms 8.9%
home#api_complex 282 ms 100.0%
home#api_complex 282 ms 100.0%
home#api_complex 282 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 18 ms 6.4%
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... 16 ms 5.7%
users/index 20 ms 7.1%
home#api_complex 282 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 6.4%
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 > ? 7 ms 2.5%