Request Details

Route
/error_prone GET
Timestamp
Sep 22, 2026 3:58 PM
Duration
63.4 ms
Status
201
Response Size
5.2 KB
Error
No

Performance Breakdown

Database
6.9% (4 queries)
View Rendering
37.0%
Application Logic
56.1%
Other Operations
0.0%
Total Operations
18
Slowest Operation
63.4 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 141.3ms 282.5ms 423.8ms 565.0ms

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 (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... 12 ms 18.9%
layouts/application 5 ms 7.9%
home#errors 63 ms 100.0%
posts/show 25 ms 39.4%
home/index 9 ms 14.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 23.7%
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... 5 ms 7.9%
home#errors 63 ms 100.0%
posts/show 20 ms 31.5%
layouts/application 24 ms 37.9%
SELECT * FROM posts WHERE created_at > ? 7 ms 11.0%
users/index 39 ms 61.5%
layouts/application 32 ms 50.5%
layouts/application 22 ms 34.7%
home#errors 63 ms 100.0%
posts/show 33 ms 52.0%
home#errors 63 ms 100.0%
home#errors 63 ms 100.0%