Request Details

Route
/error_prone GET
Timestamp
Sep 21, 2026 7:58 PM
Duration
41.71 ms
Status
200
Response Size
7.8 KB
Error
No

Performance Breakdown

Database
29.5% (7 queries)
View Rendering
51.7%
Application Logic
18.9%
Other Operations
0.0%
Total Operations
18
Slowest Operation
41.71 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 110.4ms 220.7ms 331.1ms 441.4ms

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 19 ms 45.6%
home/index 38 ms 91.1%
users/index 19 ms 45.6%
posts/show 39 ms 93.5%
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... 19 ms 45.6%
posts/show 29 ms 69.5%
home/index 30 ms 71.9%
home#errors 42 ms 100.0%
home#errors 42 ms 100.0%
home/index 26 ms 62.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 14.4%
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... 33 ms 79.1%
posts/show 16 ms 38.4%
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... 17 ms 40.8%
users/index 12 ms 28.8%
SELECT name FROM users 25 ms 59.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 5 ms 12.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 25 ms 59.9%