Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 10:21 PM
Duration
553.61 ms
Status
204
Response Size
160 KB
Error
No

Performance Breakdown

Database
2.0% (5 queries)
View Rendering
4.9%
Application Logic
93.1%
Other Operations
0.0%
Total Operations
18
Slowest Operation
553.61 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 743.3ms 1486.5ms 2229.8ms 2973.1ms

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
posts/show 13 ms 2.3%
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 > ? 2 ms 0.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 11 ms 2.0%
layouts/application 7 ms 1.3%
home/index 8 ms 1.4%
home#slow 554 ms 100.0%
layouts/application 36 ms 6.5%
home#slow 554 ms 100.0%
users/index 10 ms 1.8%
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 > ? 24 ms 4.3%
home#slow 554 ms 100.0%
layouts/application 38 ms 6.9%
users/index 14 ms 2.5%
SELECT * FROM posts WHERE created_at > ? 14 ms 2.5%
posts/show 20 ms 3.6%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 8 ms 1.4%
home#slow 554 ms 100.0%
home#slow 554 ms 100.0%