Request Details

Route
/api_complex GET
Timestamp
Sep 10, 2026 10:29 AM
Duration
315.61 ms
Status
200
Response Size
13 KB
Error
No

Performance Breakdown

Database
7.0% (10 queries)
View Rendering
8.8%
Application Logic
84.3%
Other Operations
0.0%
Total Operations
24
Slowest Operation
315.61 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 561.9ms 1123.8ms 1685.7ms 2247.7ms

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 * FROM posts WHERE created_at > ? 3 ms 1.0%
home/index 21 ms 6.7%
SELECT id, name, email FROM users WHERE id = ? 23 ms 7.3%
SELECT name FROM users 1 ms 0.3%
home#api_complex 316 ms 100.0%
home#api_complex 316 ms 100.0%
SELECT * FROM users WHERE id = ? 26 ms 8.2%
users/index 28 ms 8.9%
users/index 26 ms 8.2%
SELECT id, name FROM users WHERE email = ? 6 ms 1.9%
layouts/application 36 ms 11.4%
SELECT name FROM users 22 ms 7.0%
layouts/application 23 ms 7.3%
posts/show 19 ms 6.0%
home#api_complex 316 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 22 ms 7.0%
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... 21 ms 6.7%
SELECT * FROM users WHERE id = ? 26 ms 8.2%
home/index 9 ms 2.9%
home#api_complex 316 ms 100.0%
posts/show 35 ms 11.1%
home#api_complex 316 ms 100.0%
home#api_complex 316 ms 100.0%
SELECT name FROM users 7 ms 2.2%