Request Details

Route
/error_prone GET
Timestamp
Sep 09, 2026 5:19 PM
Duration
81.89 ms
Status
500
Response Size
2.4 KB
Error
Yes

Performance Breakdown

Database
18.5% (4 queries)
View Rendering
31.8%
Application Logic
49.7%
Other Operations
0.0%
Total Operations
13
Slowest Operation
81.89 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 82.4ms 164.9ms 247.3ms 329.8ms

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 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 > ? 4 ms 4.9%
SELECT COUNT(*) FROM comments WHERE post_id = ? 25 ms 30.5%
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... 6 ms 7.3%
home/index 5 ms 6.1%
posts/show 12 ms 14.7%
home#errors 82 ms 100.0%
home#errors 82 ms 100.0%
SELECT id, name FROM users WHERE email = ? 26 ms 31.7%
posts/show 5 ms 6.1%
posts/show 5 ms 6.1%
layouts/application 38 ms 46.4%
layouts/application 13 ms 15.9%
posts/show 27 ms 33.0%