Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 4:56 PM
Duration
219.31 ms
Status
201
Response Size
87 KB
Error
No

Performance Breakdown

Database
10.6% (9 queries)
View Rendering
5.1%
Application Logic
84.3%
Other Operations
0.0%
Total Operations
22
Slowest Operation
219.31 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 520.4ms 1040.7ms 1561.1ms 2081.5ms

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... 31 ms 14.1%
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... 13 ms 5.9%
home#api_complex 219 ms 100.0%
posts/show 30 ms 13.7%
home#api_complex 219 ms 100.0%
home#api_complex 219 ms 100.0%
users/index 28 ms 12.8%
SELECT * FROM posts WHERE created_at > ? 31 ms 14.1%
SELECT id, name FROM users WHERE email = ? 31 ms 14.1%
home#api_complex 219 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... 33 ms 15.0%
home#api_complex 219 ms 100.0%
posts/show 11 ms 5.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 1 ms 0.5%
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... 26 ms 11.9%
layouts/application 19 ms 8.7%
home#api_complex 219 ms 100.0%
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... 23 ms 10.5%
home#api_complex 219 ms 100.0%
home/index 19 ms 8.7%
SELECT * FROM users WHERE id = ? 31 ms 14.1%