Request Details

Route
/api_complex GET
Timestamp
Sep 09, 2026 7:24 PM
Duration
219.22 ms
Status
200
Response Size
56 KB
Error
No

Performance Breakdown

Database
5.1% (4 queries)
View Rendering
7.2%
Application Logic
87.7%
Other Operations
0.0%
Total Operations
19
Slowest Operation
219.22 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 500.2ms 1000.4ms 1500.6ms 2000.8ms

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... 35 ms 16.0%
home#api_complex 219 ms 100.0%
layouts/application 5 ms 2.3%
home#api_complex 219 ms 100.0%
home#api_complex 219 ms 100.0%
users/index 38 ms 17.3%
home#api_complex 219 ms 100.0%
users/index 36 ms 16.4%
posts/show 22 ms 10.0%
home#api_complex 219 ms 100.0%
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 > ? 18 ms 8.2%
layouts/application 13 ms 5.9%
home#api_complex 219 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... 32 ms 14.6%
home#api_complex 219 ms 100.0%
home#api_complex 219 ms 100.0%
home/index 15 ms 6.8%
layouts/application 16 ms 7.3%
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... 17 ms 7.8%