Request Details

Route
/error_prone GET
Timestamp
Sep 17, 2026 5:11 PM
Duration
73.69 ms
Status
204
Response Size
1.1 KB
Error
No

Performance Breakdown

Database
7.9% (5 queries)
View Rendering
8.6%
Application Logic
83.5%
Other Operations
0.0%
Total Operations
18
Slowest Operation
73.69 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 220.7ms 441.4ms 662.1ms 882.9ms

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
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... 16 ms 21.7%
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... 6 ms 8.1%
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 9.5%
home#errors 74 ms 100.0%
home#errors 74 ms 100.0%
home#errors 74 ms 100.0%
home#errors 74 ms 100.0%
posts/show 13 ms 17.6%
home/index 40 ms 54.3%
SELECT name FROM users 15 ms 20.4%
home#errors 74 ms 100.0%
home#errors 74 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... 26 ms 35.3%
home#errors 74 ms 100.0%
home#errors 74 ms 100.0%
users/index 23 ms 31.2%
home#errors 74 ms 100.0%
home#errors 74 ms 100.0%