Request Details

Route
/error_prone GET
Timestamp
Sep 19, 2026 9:38 AM
Duration
58.22 ms
Status
204
Response Size
6 KB
Error
No

Performance Breakdown

Database
18.2% (7 queries)
View Rendering
24.0%
Application Logic
57.8%
Other Operations
0.0%
Total Operations
20
Slowest Operation
58.22 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 151.1ms 302.1ms 453.2ms 604.3ms

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 58 ms 100.0%
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... 4 ms 6.9%
home/index 28 ms 48.1%
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 29.2%
layouts/application 5 ms 8.6%
DELETE FROM posts WHERE id = ? 16 ms 27.5%
SELECT COUNT(*) FROM comments WHERE post_id = ? 31 ms 53.3%
home#errors 58 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 30.9%
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 36.1%
posts/show 21 ms 36.1%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 3 ms 5.2%
layouts/application 40 ms 68.7%
users/index 24 ms 41.2%
home/index 6 ms 10.3%
home#errors 58 ms 100.0%
home#errors 58 ms 100.0%
home#errors 58 ms 100.0%
home#errors 58 ms 100.0%
posts/show 21 ms 36.1%