Request Details

Route
/error_prone GET
Timestamp
Sep 22, 2026 7:42 PM
Duration
90.35 ms
Status
404
Response Size
1.6 KB
Error
No

Performance Breakdown

Database
17.4% (4 queries)
View Rendering
1.8%
Application Logic
80.9%
Other Operations
0.0%
Total Operations
10
Slowest Operation
90.35 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 139.7ms 279.4ms 419.1ms 558.7ms

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 90 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... 32 ms 35.4%
SELECT * FROM users WHERE id = ? 35 ms 38.7%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 8 ms 8.9%
home#errors 90 ms 100.0%
home#errors 90 ms 100.0%
users/index 10 ms 11.1%
home#errors 90 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... 22 ms 24.3%
home#errors 90 ms 100.0%