Request Details

Route
/api_complex GET
Timestamp
Sep 12, 2026 8:11 PM
Duration
146.7 ms
Status
204
Response Size
41 KB
Error
No

Performance Breakdown

Database
6.9% (4 queries)
View Rendering
14.9%
Application Logic
78.2%
Other Operations
0.0%
Total Operations
19
Slowest Operation
146.7 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 328.2ms 656.4ms 984.7ms 1312.9ms

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 36 ms 24.5%
home#api_complex 147 ms 100.0%
layouts/application 33 ms 22.5%
home#api_complex 147 ms 100.0%
users/index 34 ms 23.2%
posts/show 6 ms 4.1%
home#api_complex 147 ms 100.0%
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... 32 ms 21.8%
layouts/application 32 ms 21.8%
home#api_complex 147 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... 17 ms 11.6%
home/index 10 ms 6.8%
home#api_complex 147 ms 100.0%
home#api_complex 147 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 21.1%
users/index 26 ms 17.7%
home/index 18 ms 12.3%
home#api_complex 147 ms 100.0%
SELECT name FROM users 11 ms 7.5%