Request Details

Route
/error_prone GET
Timestamp
Sep 14, 2026 8:21 AM
Duration
36.49 ms
Status
204
Response Size
1.3 KB
Error
No

Performance Breakdown

Database
30.4% (6 queries)
View Rendering
15.0%
Application Logic
54.6%
Other Operations
0.0%
Total Operations
16
Slowest Operation
36.49 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 100.2ms 200.5ms 300.7ms 401.0ms

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 36 ms 100.0%
home#errors 36 ms 100.0%
SELECT name FROM users 31 ms 84.9%
posts/show 20 ms 54.8%
home#errors 36 ms 100.0%
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... 30 ms 82.2%
posts/show 15 ms 41.1%
home#errors 36 ms 100.0%
home/index 11 ms 30.1%
posts/show 14 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... 15 ms 41.1%
home#errors 36 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 > ? 7 ms 19.2%
home#errors 36 ms 100.0%
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... 27 ms 74.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 12 ms 32.9%