Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 8:25 AM
Duration
651.26 ms
Status
200
Response Size
65 KB
Error
No

Performance Breakdown

Database
1.3% (5 queries)
View Rendering
3.6%
Application Logic
95.1%
Other Operations
0.0%
Total Operations
19
Slowest Operation
651.26 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 1198.0ms 2395.9ms 3593.9ms 4791.8ms

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/index 28 ms 4.3%
home#slow 651 ms 100.0%
users/index 13 ms 2.0%
home/index 30 ms 4.6%
home#slow 651 ms 100.0%
posts/show 14 ms 2.1%
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... 6 ms 0.9%
layouts/application 32 ms 4.9%
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 2.3%
home#slow 651 ms 100.0%
posts/show 15 ms 2.3%
home#slow 651 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... 4 ms 0.6%
home/index 39 ms 6.0%
home#slow 651 ms 100.0%
SELECT name FROM users 24 ms 3.7%
home#slow 651 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 13 ms 2.0%
home#slow 651 ms 100.0%