Request Details

Route
/api_complex GET
Timestamp
Sep 23, 2026 2:22 AM
Duration
167.62 ms
Status
204
Response Size
45 KB
Error
No

Performance Breakdown

Database
28.5% (9 queries)
View Rendering
4.8%
Application Logic
66.7%
Other Operations
0.0%
Total Operations
14
Slowest Operation
167.62 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 188.5ms 376.9ms 565.4ms 753.9ms

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
posts/show 25 ms 14.9%
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... 12 ms 7.2%
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... 20 ms 11.9%
SELECT * FROM users WHERE id = ? 30 ms 17.9%
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... 22 ms 13.1%
SELECT * FROM users WHERE id = ? 20 ms 11.9%
home#api_complex 168 ms 100.0%
layouts/application 11 ms 6.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 19.7%
home#api_complex 168 ms 100.0%
SELECT * FROM users WHERE id = ? 26 ms 15.5%
home#api_complex 168 ms 100.0%
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... 31 ms 18.5%
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... 21 ms 12.5%