Request Details

Route
/error_prone GET
Timestamp
Sep 10, 2026 12:09 PM
Duration
64.55 ms
Status
200
Response Size
5.2 KB
Error
No

Performance Breakdown

Database
31.0% (6 queries)
View Rendering
28.2%
Application Logic
40.8%
Other Operations
0.0%
Total Operations
13
Slowest Operation
64.55 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 79.0ms 158.0ms 237.1ms 316.1ms

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
posts/show 10 ms 15.5%
home/index 22 ms 34.1%
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... 29 ms 44.9%
layouts/application 18 ms 27.9%
home#errors 65 ms 100.0%
posts/show 12 ms 18.6%
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 > ? 17 ms 26.3%
SELECT * FROM posts WHERE created_at > ? 35 ms 54.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 4.6%
posts/show 27 ms 41.8%
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... 6 ms 9.3%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 8 ms 12.4%
home#errors 65 ms 100.0%