Request Details

Route
/error_prone GET
Timestamp
Sep 21, 2026 9:19 PM
Duration
42.0 ms
Status
201
Response Size
4.6 KB
Error
No

Performance Breakdown

Database
26.0% (3 queries)
View Rendering
25.2%
Application Logic
48.8%
Other Operations
0.0%
Total Operations
10
Slowest Operation
42.0 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 64.5ms 129.0ms 193.5ms 258.0ms

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 users WHERE id = ? 19 ms 45.2%
posts/show 18 ms 42.9%
home#errors 42 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 71.4%
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... 18 ms 42.9%
users/index 32 ms 76.2%
layouts/application 9 ms 21.4%
home/index 6 ms 14.3%
home#errors 42 ms 100.0%
home#errors 42 ms 100.0%