Request Details

Route
/api_complex GET
Timestamp
Sep 13, 2026 2:32 PM
Duration
275.91 ms
Status
200
Response Size
42 KB
Error
No

Performance Breakdown

Database
4.1% (2 queries)
View Rendering
10.0%
Application Logic
86.0%
Other Operations
0.0%
Total Operations
10
Slowest Operation
275.91 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 240.7ms 481.4ms 722.0ms 962.7ms

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
home#api_complex 276 ms 100.0%
layouts/application 11 ms 4.0%
home#api_complex 276 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 11.6%
layouts/application 10 ms 3.6%
home#api_complex 276 ms 100.0%
home/index 35 ms 12.7%
home/index 32 ms 11.6%
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... 7 ms 2.5%
posts/show 8 ms 2.9%