Request Details

Route
/error_prone GET
Timestamp
Sep 22, 2026 3:47 PM
Duration
66.79 ms
Status
204
Response Size
1.5 KB
Error
No

Performance Breakdown

Database
16.8% (5 queries)
View Rendering
21.6%
Application Logic
61.6%
Other Operations
0.0%
Total Operations
15
Slowest Operation
66.79 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 135.5ms 271.0ms 406.5ms 542.0ms

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
home#errors 67 ms 100.0%
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... 35 ms 52.4%
home#errors 67 ms 100.0%
home#errors 67 ms 100.0%
home/index 34 ms 50.9%
home/index 14 ms 21.0%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 23 ms 34.4%
home#errors 67 ms 100.0%
layouts/application 32 ms 47.9%
home#errors 67 ms 100.0%
SELECT name FROM users 25 ms 37.4%
users/index 17 ms 25.5%
SELECT * FROM posts WHERE created_at > ? 1 ms 1.5%
SELECT COUNT(*) FROM comments WHERE post_id = ? 7 ms 10.5%
posts/show 20 ms 29.9%