Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 3:00 AM
Duration
272.42 ms
Status
204
Response Size
25 KB
Error
No

Performance Breakdown

Database
2.6% (6 queries)
View Rendering
6.0%
Application Logic
91.5%
Other Operations
0.0%
Total Operations
25
Slowest Operation
272.42 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 819.2ms 1638.3ms 2457.5ms 3276.6ms

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 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... 5 ms 1.8%
layouts/application 22 ms 8.1%
home#api_complex 272 ms 100.0%
users/index 31 ms 11.4%
users/index 23 ms 8.4%
home#api_complex 272 ms 100.0%
home#api_complex 272 ms 100.0%
home/index 30 ms 11.0%
SELECT name FROM users 33 ms 12.1%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 2 ms 0.7%
home#api_complex 272 ms 100.0%
home#api_complex 272 ms 100.0%
layouts/application 33 ms 12.1%
home#api_complex 272 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 6.6%
home/index 24 ms 8.8%
home#api_complex 272 ms 100.0%
home#api_complex 272 ms 100.0%
home#api_complex 272 ms 100.0%
home/index 12 ms 4.4%
layouts/application 21 ms 7.7%
home#api_complex 272 ms 100.0%
home#api_complex 272 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 3.7%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 16 ms 5.9%