Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 11:58 AM
Duration
425.07 ms
Status
200
Response Size
140 KB
Error
No

Performance Breakdown

Database
3.3% (6 queries)
View Rendering
3.3%
Application Logic
93.3%
Other Operations
0.0%
Total Operations
20
Slowest Operation
425.07 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 910.9ms 1821.8ms 2732.7ms 3643.6ms

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 37 ms 8.7%
home#slow 425 ms 100.0%
layouts/application 27 ms 6.4%
home#slow 425 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 12 ms 2.8%
home#slow 425 ms 100.0%
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... 9 ms 2.1%
home#slow 425 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 21 ms 4.9%
home/index 17 ms 4.0%
layouts/application 11 ms 2.6%
home#slow 425 ms 100.0%
home#slow 425 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 5.9%
layouts/application 16 ms 3.8%
home#slow 425 ms 100.0%
SELECT name FROM users 27 ms 6.4%
layouts/application 14 ms 3.3%
home#slow 425 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 > ? 27 ms 6.4%