Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 11:17 PM
Duration
452.86 ms
Status
200
Response Size
180 KB
Error
No

Performance Breakdown

Database
2.4% (4 queries)
View Rendering
7.2%
Application Logic
90.4%
Other Operations
0.0%
Total Operations
19
Slowest Operation
452.86 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 751.3ms 1502.6ms 2253.9ms 3005.2ms

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
home/index 27 ms 6.0%
layouts/application 22 ms 4.9%
home#slow 453 ms 100.0%
posts/show 32 ms 7.1%
users/index 34 ms 7.5%
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... 10 ms 2.2%
home#slow 453 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 30 ms 6.6%
home#slow 453 ms 100.0%
home#slow 453 ms 100.0%
home#slow 453 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 18 ms 4.0%
layouts/application 26 ms 5.7%
users/index 6 ms 1.3%
home/index 15 ms 3.3%
posts/show 25 ms 5.5%
home#slow 453 ms 100.0%
posts/show 28 ms 6.2%
DELETE FROM comments WHERE created_at < ? 15 ms 3.3%