Request Details

Route
/api_complex GET
Timestamp
Sep 23, 2026 10:47 PM
Duration
190.52 ms
Status
200
Response Size
31 KB
Error
No

Performance Breakdown

Database
5.8% (5 queries)
View Rendering
18.8%
Application Logic
75.4%
Other Operations
0.0%
Total Operations
21
Slowest Operation
190.52 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 315.9ms 631.8ms 947.7ms 1263.6ms

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 (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... 23 ms 12.1%
home#api_complex 191 ms 100.0%
posts/show 21 ms 11.0%
users/index 9 ms 4.7%
layouts/application 36 ms 18.9%
users/index 23 ms 12.1%
layouts/application 18 ms 9.4%
SELECT name FROM users 1 ms 0.5%
layouts/application 20 ms 10.5%
home#api_complex 191 ms 100.0%
home#api_complex 191 ms 100.0%
home#api_complex 191 ms 100.0%
home/index 11 ms 5.8%
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 4.2%
posts/show 15 ms 7.9%
posts/show 34 ms 17.8%
users/index 37 ms 19.4%
users/index 14 ms 7.3%
SELECT * FROM users WHERE id = ? 35 ms 18.4%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 6 ms 3.1%
home#api_complex 191 ms 100.0%