Request Details

Route
/error_prone GET
Timestamp
Sep 21, 2026 7:27 PM
Duration
40.64 ms
Status
204
Response Size
4.7 KB
Error
No

Performance Breakdown

Database
10.3% (3 queries)
View Rendering
18.1%
Application Logic
71.6%
Other Operations
0.0%
Total Operations
13
Slowest Operation
40.64 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 99.4ms 198.7ms 298.1ms 397.5ms

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
posts/show 18 ms 44.3%
posts/show 17 ms 41.8%
users/index 37 ms 91.0%
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 41.8%
home#errors 41 ms 100.0%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 9 ms 22.1%
home#errors 41 ms 100.0%
home#errors 41 ms 100.0%
home#errors 41 ms 100.0%
home#errors 41 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 15 ms 36.9%
home#errors 41 ms 100.0%
home#errors 41 ms 100.0%