Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 12:56 AM
Duration
209.64 ms
Status
201
Response Size
49 KB
Error
No

Performance Breakdown

Database
22.8% (7 queries)
View Rendering
18.9%
Application Logic
58.3%
Other Operations
0.0%
Total Operations
15
Slowest Operation
209.64 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 179.8ms 359.6ms 539.5ms 719.3ms

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 id, name FROM users WHERE email = ? 5 ms 2.4%
posts/show 38 ms 18.1%
users/index 9 ms 4.3%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 26 ms 12.4%
layouts/application 16 ms 7.6%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 22 ms 10.5%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 29 ms 13.8%
posts/show 21 ms 10.0%
home#slow 210 ms 100.0%
home#slow 210 ms 100.0%
layouts/application 31 ms 14.8%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 14.8%
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 > ? 25 ms 11.9%
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... 26 ms 12.4%
layouts/application 21 ms 10.0%