Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 6:18 AM
Duration
153.06 ms
Status
204
Response Size
73 KB
Error
No

Performance Breakdown

Database
8.1% (5 queries)
View Rendering
15.9%
Application Logic
76.0%
Other Operations
0.0%
Total Operations
15
Slowest Operation
153.06 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 201.3ms 402.6ms 603.9ms 805.3ms

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 name FROM users 5 ms 3.3%
layouts/application 14 ms 9.1%
home#api_complex 153 ms 100.0%
users/index 30 ms 19.6%
home#api_complex 153 ms 100.0%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 12 ms 7.8%
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 > ? 8 ms 5.2%
posts/show 20 ms 13.1%
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... 34 ms 22.2%
home#api_complex 153 ms 100.0%
home#api_complex 153 ms 100.0%
posts/show 10 ms 6.5%
posts/show 29 ms 18.9%
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 > ? 6 ms 3.9%
posts/show 25 ms 16.3%