Request Details

Route
/api_complex GET
Timestamp
Sep 21, 2026 12:36 AM
Duration
195.2 ms
Status
201
Response Size
41 KB
Error
No

Performance Breakdown

Database
2.5% (3 queries)
View Rendering
14.5%
Application Logic
83.0%
Other Operations
0.0%
Total Operations
21
Slowest Operation
195.2 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 411.3ms 822.7ms 1234.0ms 1645.4ms

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 195 ms 100.0%
home/index 12 ms 6.1%
posts/show 10 ms 5.1%
posts/show 25 ms 12.8%
home#api_complex 195 ms 100.0%
home#api_complex 195 ms 100.0%
users/index 35 ms 17.9%
posts/show 27 ms 13.8%
posts/show 29 ms 14.9%
home#api_complex 195 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... 28 ms 14.3%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 5 ms 2.6%
posts/show 8 ms 4.1%
users/index 32 ms 16.4%
home#api_complex 195 ms 100.0%
home#api_complex 195 ms 100.0%
home/index 34 ms 17.4%
home/index 10 ms 5.1%
posts/show 16 ms 8.2%
home#api_complex 195 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... 8 ms 4.1%