Request Details

Route
/error_prone GET
Timestamp
Sep 22, 2026 11:43 AM
Duration
98.7 ms
Status
404
Response Size
1.5 KB
Error
No

Performance Breakdown

Database
12.8% (7 queries)
View Rendering
11.4%
Application Logic
75.8%
Other Operations
0.0%
Total Operations
20
Slowest Operation
98.7 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 260.4ms 520.8ms 781.2ms 1041.6ms

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
users/index 31 ms 31.4%
SELECT name FROM users 18 ms 18.2%
home#errors 99 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 > ? 1 ms 1.0%
home#errors 99 ms 100.0%
home#errors 99 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... 24 ms 24.3%
SELECT id, name, email FROM users WHERE id = ? 22 ms 22.3%
layouts/application 5 ms 5.1%
SELECT * FROM users WHERE id = ? 10 ms 10.1%
layouts/application 28 ms 28.4%
home#errors 99 ms 100.0%
home/index 19 ms 19.2%
home#errors 99 ms 100.0%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 29 ms 29.4%
layouts/application 36 ms 36.5%
home#errors 99 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 29 ms 29.4%
home#errors 99 ms 100.0%
home#errors 99 ms 100.0%