Request Details

Route
/error_prone GET
Timestamp
Sep 09, 2026 4:29 PM
Duration
50.25 ms
Status
201
Response Size
2.2 KB
Error
No

Performance Breakdown

Database
28.9% (9 queries)
View Rendering
3.2%
Application Logic
67.9%
Other Operations
0.0%
Total Operations
15
Slowest Operation
50.25 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 92.6ms 185.1ms 277.7ms 370.2ms

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#errors 50 ms 100.0%
home#errors 50 ms 100.0%
posts/show 12 ms 23.9%
home#errors 50 ms 100.0%
SELECT * FROM users WHERE id = ? 1 ms 2.0%
home#errors 50 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 > ? 2 ms 4.0%
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... 13 ms 25.9%
SELECT * FROM users WHERE id = ? 24 ms 47.8%
SELECT * FROM users WHERE id = ? 8 ms 15.9%
SELECT * FROM posts WHERE created_at > ? 10 ms 19.9%
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... 21 ms 41.8%
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... 19 ms 37.8%
home#errors 50 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 9 ms 17.9%