Request Details

Route
/api_complex GET
Timestamp
Sep 20, 2026 8:45 PM
Duration
167.07 ms
Status
204
Response Size
47 KB
Error
No

Performance Breakdown

Database
7.3% (6 queries)
View Rendering
10.3%
Application Logic
82.3%
Other Operations
0.0%
Total Operations
16
Slowest Operation
167.07 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 304.4ms 608.7ms 913.1ms 1217.4ms

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 167 ms 100.0%
SELECT name FROM users 29 ms 17.4%
SELECT * FROM posts WHERE created_at > ? 7 ms 4.2%
layouts/application 39 ms 23.3%
SELECT id, name, email FROM users WHERE id = ? 2 ms 1.2%
home#api_complex 167 ms 100.0%
home#api_complex 167 ms 100.0%
layouts/application 27 ms 16.2%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 15.0%
layouts/application 35 ms 20.9%
home#api_complex 167 ms 100.0%
posts/show 25 ms 15.0%
home#api_complex 167 ms 100.0%
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... 20 ms 12.0%
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 > ? 6 ms 3.6%
home#api_complex 167 ms 100.0%