Request Details

Route
/error_prone GET
Timestamp
Sep 10, 2026 8:42 AM
Duration
19.99 ms
Status
204
Response Size
7.3 KB
Error
No

Performance Breakdown

Database
17.8% (3 queries)
View Rendering
39.3%
Application Logic
42.9%
Other Operations
0.0%
Total Operations
16
Slowest Operation
36.0 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 81.5ms 162.9ms 244.4ms 325.9ms

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
home#errors 20 ms 100.0%
home#errors 20 ms 100.0%
layouts/application 28 ms 140.1%
home#errors 20 ms 100.0%
users/index 22 ms 110.1%
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... 8 ms 40.0%
home#errors 20 ms 100.0%
layouts/application 36 ms 180.1%
home#errors 20 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 > ? 35 ms 175.1%
home/index 9 ms 45.0%
posts/show 14 ms 70.1%
users/index 19 ms 95.1%
home#errors 20 ms 100.0%
home#errors 20 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 > ? 15 ms 75.1%