Request Details

Route
/api_complex GET
Timestamp
Sep 12, 2026 1:19 PM
Duration
127.11 ms
Status
200
Response Size
61 KB
Error
No

Performance Breakdown

Database
15.4% (6 queries)
View Rendering
6.9%
Application Logic
77.7%
Other Operations
0.0%
Total Operations
16
Slowest Operation
127.11 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 245.4ms 490.8ms 736.2ms 981.7ms

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
layouts/application 9 ms 7.1%
users/index 16 ms 12.6%
layouts/application 31 ms 24.4%
users/index 12 ms 9.4%
home#api_complex 127 ms 100.0%
home#api_complex 127 ms 100.0%
home#api_complex 127 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... 6 ms 4.7%
SELECT * FROM users WHERE id = ? 31 ms 24.4%
home#api_complex 127 ms 100.0%
home#api_complex 127 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 31 ms 24.4%
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 27.5%
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... 29 ms 22.8%
home#api_complex 127 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 19 ms 14.9%