Request Details

Route
/error_prone GET
Timestamp
Sep 12, 2026 9:01 PM
Duration
41.53 ms
Status
200
Response Size
2 KB
Error
No

Performance Breakdown

Database
26.8% (5 queries)
View Rendering
19.4%
Application Logic
53.8%
Other Operations
0.0%
Total Operations
11
Slowest Operation
41.53 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 57.9ms 115.8ms 173.7ms 231.6ms

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
home#errors 42 ms 100.0%
layouts/application 20 ms 48.2%
home#errors 42 ms 100.0%
users/index 10 ms 24.1%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 6 ms 14.4%
users/index 15 ms 36.1%
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... 17 ms 40.9%
SELECT * FROM users WHERE id = ? 4 ms 9.6%
home#errors 42 ms 100.0%
SELECT id, name FROM users WHERE email = ? 34 ms 81.9%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 1 ms 2.4%