Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 10:27 AM
Duration
319.41 ms
Status
201
Response Size
170 KB
Error
No

Performance Breakdown

Database
3.5% (6 queries)
View Rendering
5.1%
Application Logic
91.4%
Other Operations
0.0%
Total Operations
25
Slowest Operation
319.41 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 873.8ms 1747.6ms 2621.4ms 3495.1ms

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 319 ms 100.0%
SELECT * FROM users WHERE id = ? 7 ms 2.2%
home#slow 319 ms 100.0%
posts/show 12 ms 3.8%
users/index 8 ms 2.5%
home#slow 319 ms 100.0%
home#slow 319 ms 100.0%
users/index 39 ms 12.2%
layouts/application 10 ms 3.1%
DELETE FROM posts WHERE id = ? 34 ms 10.6%
home#slow 319 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... 25 ms 7.8%
home#slow 319 ms 100.0%
home/index 5 ms 1.6%
home#slow 319 ms 100.0%
home#slow 319 ms 100.0%
home#slow 319 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 10.3%
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... 15 ms 4.7%
layouts/application 10 ms 3.1%
home/index 35 ms 11.0%
users/index 22 ms 6.9%
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... 7 ms 2.2%
users/index 39 ms 12.2%
home#slow 319 ms 100.0%