Request Details

Route
/error_prone GET
Timestamp
Sep 12, 2026 4:24 AM
Duration
28.95 ms
Status
201
Response Size
5.6 KB
Error
No

Performance Breakdown

Database
38.7% (5 queries)
View Rendering
39.1%
Application Logic
22.2%
Other Operations
0.0%
Total Operations
12
Slowest Operation
37.0 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 65.2ms 130.5ms 195.7ms 260.9ms

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 8 ms 27.6%
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 > ? 22 ms 76.0%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 20 ms 69.1%
home/index 14 ms 48.4%
home#errors 29 ms 100.0%
layouts/application 37 ms 127.8%
posts/show 33 ms 114.0%
home/index 10 ms 34.5%
home#errors 29 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 103.6%
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... 19 ms 65.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 10 ms 34.5%