Request Details

Route
/api_complex GET
Timestamp
Sep 11, 2026 1:20 AM
Duration
135.34 ms
Status
204
Response Size
14 KB
Error
No

Performance Breakdown

Database
13.6% (8 queries)
View Rendering
11.0%
Application Logic
75.4%
Other Operations
0.0%
Total Operations
19
Slowest Operation
135.34 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 224.4ms 448.8ms 673.3ms 897.7ms

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
SELECT id, name, email FROM users WHERE id = ? 26 ms 19.2%
layouts/application 17 ms 12.6%
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... 11 ms 8.1%
users/index 10 ms 7.4%
home#api_complex 135 ms 100.0%
users/index 28 ms 20.7%
home#api_complex 135 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 22.9%
SELECT id, name FROM users WHERE email = ? 5 ms 3.7%
posts/show 19 ms 14.0%
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... 7 ms 5.2%
SELECT id, name, email FROM users WHERE id = ? 1 ms 0.7%
posts/show 19 ms 14.0%
users/index 6 ms 4.4%
home#api_complex 135 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... 15 ms 11.1%
home#api_complex 135 ms 100.0%
SELECT name FROM users 26 ms 19.2%
home#api_complex 135 ms 100.0%