Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 12:27 PM
Duration
302.27 ms
Status
204
Response Size
170 KB
Error
No

Performance Breakdown

Database
7.2% (6 queries)
View Rendering
3.3%
Application Logic
89.5%
Other Operations
0.0%
Total Operations
16
Slowest Operation
302.27 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 506.4ms 1012.8ms 1519.2ms 2025.6ms

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
users/index 18 ms 6.0%
home/index 9 ms 3.0%
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... 30 ms 9.9%
posts/show 34 ms 11.2%
home#slow 302 ms 100.0%
home#slow 302 ms 100.0%
home#slow 302 ms 100.0%
SELECT * FROM users WHERE id = ? 26 ms 8.6%
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 2.3%
home#slow 302 ms 100.0%
posts/show 5 ms 1.7%
home#slow 302 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 > ? 25 ms 8.3%
home#slow 302 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 30 ms 9.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 28 ms 9.3%