Request Details

Route
/error_prone GET
Timestamp
Sep 22, 2026 7:26 PM
Duration
33.25 ms
Status
201
Response Size
4.8 KB
Error
No

Performance Breakdown

Database
44.5% (9 queries)
View Rendering
46.4%
Application Logic
9.1%
Other Operations
0.0%
Total Operations
17
Slowest Operation
39.0 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 91.1ms 182.1ms 273.2ms 364.3ms

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
layouts/application 26 ms 78.2%
SELECT id, name FROM users WHERE email = ? 21 ms 63.1%
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... 23 ms 69.2%
posts/show 6 ms 18.0%
home/index 22 ms 66.2%
layouts/application 39 ms 117.3%
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 > ? 5 ms 15.0%
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... 35 ms 105.2%
posts/show 6 ms 18.0%
posts/show 34 ms 102.2%
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 3.0%
home#errors 33 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 32 ms 96.2%
SELECT name FROM users 21 ms 63.1%
SELECT name FROM users 21 ms 63.1%
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... 3 ms 9.0%
home/index 36 ms 108.3%