Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 2:19 AM
Duration
290.73 ms
Status
201
Response Size
120 KB
Error
No

Performance Breakdown

Database
2.4% (6 queries)
View Rendering
5.4%
Application Logic
92.2%
Other Operations
0.0%
Total Operations
30
Slowest Operation
290.73 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 945.7ms 1891.4ms 2837.1ms 3782.7ms

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 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... 24 ms 8.3%
home#slow 291 ms 100.0%
home#slow 291 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... 19 ms 6.5%
home#slow 291 ms 100.0%
home/index 9 ms 3.1%
home#slow 291 ms 100.0%
home#slow 291 ms 100.0%
home#slow 291 ms 100.0%
users/index 25 ms 8.6%
home#slow 291 ms 100.0%
home#slow 291 ms 100.0%
home/index 15 ms 5.2%
posts/show 7 ms 2.4%
posts/show 6 ms 2.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 10.3%
users/index 25 ms 8.6%
home/index 16 ms 5.5%
users/index 31 ms 10.7%
layouts/application 11 ms 3.8%
home#slow 291 ms 100.0%
home#slow 291 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 > ? 10 ms 3.4%
home#slow 291 ms 100.0%
posts/show 27 ms 9.3%
layouts/application 22 ms 7.6%
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 > ? 1 ms 0.3%
home#slow 291 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 2.4%
users/index 9 ms 3.1%