Request Details

Route
/error_prone GET
Timestamp
Sep 09, 2026 6:22 PM
Duration
229.29 ms
Status
503
Response Size
2.9 KB
Error
Yes

Performance Breakdown

Database
5.8% (5 queries)
View Rendering
10.5%
Application Logic
83.7%
Other Operations
0.0%
Total Operations
19
Slowest Operation
229.29 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 410.7ms 821.4ms 1232.1ms 1642.7ms

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
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... 34 ms 14.8%
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... 29 ms 12.6%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 5 ms 2.2%
users/index 38 ms 16.6%
users/index 15 ms 6.5%
layouts/application 36 ms 15.7%
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 > ? 18 ms 7.9%
home#errors 229 ms 100.0%
home/index 26 ms 11.3%
home#errors 229 ms 100.0%
home#errors 229 ms 100.0%
posts/show 6 ms 2.6%
home#errors 229 ms 100.0%
home/index 6 ms 2.6%
posts/show 28 ms 12.2%
home#errors 229 ms 100.0%
SELECT name FROM users 9 ms 3.9%
posts/show 17 ms 7.4%
home#errors 229 ms 100.0%