Request Details

Route
/api_complex GET
Timestamp
Sep 23, 2026 3:04 AM
Duration
171.29 ms
Status
200
Response Size
37 KB
Error
No

Performance Breakdown

Database
20.8% (5 queries)
View Rendering
37.2%
Application Logic
42.0%
Other Operations
0.0%
Total Operations
13
Slowest Operation
171.29 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 102.1ms 204.1ms 306.2ms 408.3ms

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 posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 1.2%
DELETE FROM comments WHERE created_at < ? 31 ms 18.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 18.7%
layouts/application 7 ms 4.1%
SELECT * FROM posts WHERE created_at > ? 1 ms 0.6%
layouts/application 28 ms 16.3%
home/index 7 ms 4.1%
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 > ? 19 ms 11.1%
home/index 25 ms 14.6%
users/index 23 ms 13.4%
posts/show 31 ms 18.1%
home#api_complex 171 ms 100.0%
users/index 31 ms 18.1%