Request Details

Route
/api_complex GET
Timestamp
Sep 19, 2026 8:04 AM
Duration
136.98 ms
Status
201
Response Size
16 KB
Error
No

Performance Breakdown

Database
9.0% (5 queries)
View Rendering
16.5%
Application Logic
74.5%
Other Operations
0.0%
Total Operations
17
Slowest Operation
136.98 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 275.7ms 551.4ms 827.2ms 1102.9ms

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
SELECT id, name FROM users WHERE email = ? 23 ms 16.8%
SELECT name FROM users 18 ms 13.1%
layouts/application 30 ms 21.9%
home#api_complex 137 ms 100.0%
posts/show 21 ms 15.3%
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... 28 ms 20.4%
users/index 25 ms 18.3%
layouts/application 34 ms 24.8%
SELECT * FROM users WHERE id = ? 21 ms 15.3%
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... 9 ms 6.6%
home#api_complex 137 ms 100.0%
home#api_complex 137 ms 100.0%
posts/show 36 ms 26.3%
home#api_complex 137 ms 100.0%
home#api_complex 137 ms 100.0%
home#api_complex 137 ms 100.0%
posts/show 36 ms 26.3%