Request Details

Route
/error_prone GET
Timestamp
Sep 21, 2026 1:29 PM
Duration
113.05 ms
Status
200
Response Size
3.2 KB
Error
No

Performance Breakdown

Database
18.1% (6 queries)
View Rendering
25.5%
Application Logic
56.4%
Other Operations
0.0%
Total Operations
16
Slowest Operation
113.05 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 150.3ms 300.6ms 450.9ms 601.2ms

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/index 40 ms 35.4%
users/index 23 ms 20.3%
home#errors 113 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... 1 ms 0.9%
layouts/application 29 ms 25.7%
users/index 23 ms 20.3%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 5 ms 4.4%
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... 33 ms 29.2%
posts/show 15 ms 13.3%
home#errors 113 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 35 ms 31.0%
users/index 8 ms 7.1%
home#errors 113 ms 100.0%
SELECT * FROM users WHERE id = ? 21 ms 18.6%
home/index 15 ms 13.3%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 14 ms 12.4%