Request Details

Route
/api_complex GET
Timestamp
Sep 10, 2026 5:34 AM
Duration
190.59 ms
Status
204
Response Size
28 KB
Error
No

Performance Breakdown

Database
20.2% (5 queries)
View Rendering
11.6%
Application Logic
68.2%
Other Operations
0.0%
Total Operations
10
Slowest Operation
190.59 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 139.8ms 279.6ms 419.4ms 559.2ms

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 > ? 27 ms 14.2%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 5 ms 2.6%
users/index 31 ms 16.3%
home#api_complex 191 ms 100.0%
SELECT * FROM users WHERE id = ? 18 ms 9.4%
home#api_complex 191 ms 100.0%
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 > ? 34 ms 17.8%
users/index 8 ms 4.2%
users/index 26 ms 13.6%
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... 29 ms 15.2%