Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 4:52 AM
Duration
317.01 ms
Status
201
Response Size
150 KB
Error
No

Performance Breakdown

Database
2.7% (5 queries)
View Rendering
3.7%
Application Logic
93.5%
Other Operations
0.0%
Total Operations
28
Slowest Operation
317.01 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 1270.8ms 2541.6ms 3812.4ms 5083.1ms

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
home#slow 317 ms 100.0%
SELECT name FROM users 25 ms 7.9%
home#slow 317 ms 100.0%
layouts/application 39 ms 12.3%
home#slow 317 ms 100.0%
home#slow 317 ms 100.0%
users/index 31 ms 9.8%
home#slow 317 ms 100.0%
layouts/application 29 ms 9.1%
posts/show 20 ms 6.3%
home#slow 317 ms 100.0%
home#slow 317 ms 100.0%
home#slow 317 ms 100.0%
home#slow 317 ms 100.0%
SELECT name FROM users 34 ms 10.7%
posts/show 10 ms 3.2%
home#slow 317 ms 100.0%
home#slow 317 ms 100.0%
home#slow 317 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 > ? 33 ms 10.4%
home/index 8 ms 2.5%
home#slow 317 ms 100.0%
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... 27 ms 8.5%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 20 ms 6.3%
home#slow 317 ms 100.0%
home/index 32 ms 10.1%
home#slow 317 ms 100.0%
users/index 20 ms 6.3%