Request Details

Route
/error_prone GET
Timestamp
Sep 12, 2026 1:19 PM
Duration
18.7 ms
Status
204
Response Size
5.2 KB
Error
No

Performance Breakdown

Database
31.9% (6 queries)
View Rendering
20.0%
Application Logic
48.2%
Other Operations
0.0%
Total Operations
16
Slowest Operation
34.0 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 77.7ms 155.3ms 233.0ms 310.6ms

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 comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 123.0%
home#errors 19 ms 100.0%
posts/show 28 ms 149.7%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 112.3%
home#errors 19 ms 100.0%
home#errors 19 ms 100.0%
home#errors 19 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... 9 ms 48.1%
layouts/application 34 ms 181.8%
home#errors 19 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... 26 ms 139.0%
SELECT name FROM users 16 ms 85.5%
home#errors 19 ms 100.0%
home#errors 19 ms 100.0%
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... 4 ms 21.4%
home#errors 19 ms 100.0%