Request Details

Route
/error_prone GET
Timestamp
Sep 22, 2026 5:42 PM
Duration
35.21 ms
Status
204
Response Size
3.2 KB
Error
No

Performance Breakdown

Database
33.6% (4 queries)
View Rendering
30.2%
Application Logic
36.2%
Other Operations
0.0%
Total Operations
11
Slowest Operation
35.21 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 72.9ms 145.8ms 218.7ms 291.6ms

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
SELECT * FROM posts WHERE created_at > ? 19 ms 54.0%
SELECT * FROM posts WHERE created_at > ? 24 ms 68.2%
users/index 5 ms 14.2%
home#errors 35 ms 100.0%
home#errors 35 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... 25 ms 71.0%
home/index 28 ms 79.5%
home/index 25 ms 71.0%
layouts/application 30 ms 85.2%
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... 30 ms 85.2%
home#errors 35 ms 100.0%