Request Details

Route
/api_complex GET
Timestamp
Sep 21, 2026 7:10 AM
Duration
120.07 ms
Status
200
Response Size
44 KB
Error
No

Performance Breakdown

Database
7.3% (5 queries)
View Rendering
8.0%
Application Logic
84.6%
Other Operations
0.0%
Total Operations
22
Slowest Operation
120.07 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 354.7ms 709.4ms 1064.0ms 1418.7ms

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
layouts/application 24 ms 20.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 25 ms 20.8%
posts/show 7 ms 5.8%
home#api_complex 120 ms 100.0%
posts/show 16 ms 13.3%
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... 19 ms 15.8%
home#api_complex 120 ms 100.0%
home/index 11 ms 9.2%
home#api_complex 120 ms 100.0%
home#api_complex 120 ms 100.0%
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... 20 ms 16.7%
home#api_complex 120 ms 100.0%
home#api_complex 120 ms 100.0%
layouts/application 30 ms 25.0%
home#api_complex 120 ms 100.0%
posts/show 13 ms 10.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 25.0%
posts/show 13 ms 10.8%
home#api_complex 120 ms 100.0%
home#api_complex 120 ms 100.0%
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... 10 ms 8.3%
home#api_complex 120 ms 100.0%