Request Details

Route
/error_prone GET
Timestamp
Sep 09, 2026 4:14 PM
Duration
55.64 ms
Status
201
Response Size
3.9 KB
Error
No

Performance Breakdown

Database
25.3% (5 queries)
View Rendering
26.0%
Application Logic
48.6%
Other Operations
0.0%
Total Operations
17
Slowest Operation
55.64 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 143.0ms 286.1ms 429.1ms 572.2ms

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.* 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... 33 ms 59.3%
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 > ? 31 ms 55.7%
home#errors 56 ms 100.0%
posts/show 24 ms 43.1%
users/index 18 ms 32.4%
home#errors 56 ms 100.0%
posts/show 30 ms 53.9%
posts/show 13 ms 23.4%
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... 29 ms 52.1%
SELECT * FROM users WHERE id = ? 28 ms 50.3%
home/index 5 ms 9.0%
home#errors 56 ms 100.0%
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... 24 ms 43.1%
home#errors 56 ms 100.0%
home#errors 56 ms 100.0%
users/index 31 ms 55.7%
posts/show 28 ms 50.3%