Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 3:19 PM
Duration
419.65 ms
Status
204
Response Size
180 KB
Error
No

Performance Breakdown

Database
6.9% (7 queries)
View Rendering
5.2%
Application Logic
87.9%
Other Operations
0.0%
Total Operations
16
Slowest Operation
419.65 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 596.8ms 1193.6ms 1790.4ms 2387.3ms

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
users/index 30 ms 7.1%
layouts/application 33 ms 7.9%
posts/show 25 ms 6.0%
home#slow 420 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... 26 ms 6.2%
home/index 37 ms 8.8%
home#slow 420 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 33 ms 7.9%
home#slow 420 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 > ? 28 ms 6.7%
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... 35 ms 8.3%
home#slow 420 ms 100.0%
SELECT name FROM users 8 ms 1.9%
home#slow 420 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 > ? 9 ms 2.1%
SELECT * FROM users WHERE id = ? 25 ms 6.0%