Request Details

Route
/error_prone GET
Timestamp
Sep 22, 2026 11:36 PM
Duration
56.8 ms
Status
204
Response Size
7 KB
Error
No

Performance Breakdown

Database
34.4% (8 queries)
View Rendering
35.0%
Application Logic
30.6%
Other Operations
0.0%
Total Operations
18
Slowest Operation
56.8 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 139.3ms 278.7ms 418.0ms 557.4ms

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... 5 ms 8.8%
posts/show 38 ms 66.9%
posts/show 32 ms 56.3%
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 > ? 33 ms 58.1%
layouts/application 14 ms 24.6%
home#errors 57 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 42.3%
home/index 31 ms 54.6%
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... 29 ms 51.1%
SELECT * FROM posts WHERE created_at > ? 25 ms 44.0%
home#errors 57 ms 100.0%
home/index 37 ms 65.1%
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... 32 ms 56.3%
home#errors 57 ms 100.0%
layouts/application 28 ms 49.3%
SELECT * FROM users WHERE id = ? 20 ms 35.2%
home/index 15 ms 26.4%
SELECT * FROM posts WHERE created_at > ? 24 ms 42.3%