Request Details

Route
/api_complex GET
Timestamp
Sep 13, 2026 12:07 AM
Duration
277.64 ms
Status
200
Response Size
39 KB
Error
No

Performance Breakdown

Database
25.6% (6 queries)
View Rendering
16.2%
Application Logic
58.2%
Other Operations
0.0%
Total Operations
10
Slowest Operation
277.64 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 119.2ms 238.3ms 357.5ms 476.6ms

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
layouts/application 18 ms 6.5%
SELECT * FROM users WHERE id = ? 32 ms 11.5%
users/index 24 ms 8.6%
home#api_complex 278 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 > ? 1 ms 0.4%
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... 33 ms 11.9%
users/index 35 ms 12.6%
SELECT name FROM users 30 ms 10.8%
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... 12 ms 4.3%
SELECT * FROM users WHERE id = ? 14 ms 5.0%