Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 10:46 AM
Duration
553.52 ms
Status
204
Response Size
200 KB
Error
No

Performance Breakdown

Database
2.6% (9 queries)
View Rendering
4.3%
Application Logic
93.1%
Other Operations
0.0%
Total Operations
28
Slowest Operation
553.52 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 1486.1ms 2972.1ms 4458.2ms 5944.2ms

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 554 ms 100.0%
posts/show 35 ms 6.3%
SELECT * FROM posts WHERE created_at > ? 16 ms 2.9%
home#slow 554 ms 100.0%
SELECT name FROM users 22 ms 4.0%
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 > ? 7 ms 1.3%
home#slow 554 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 16 ms 2.9%
SELECT name FROM users 22 ms 4.0%
posts/show 30 ms 5.4%
home#slow 554 ms 100.0%
home#slow 554 ms 100.0%
home#slow 554 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 20 ms 3.6%
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... 28 ms 5.1%
home/index 24 ms 4.3%
posts/show 22 ms 4.0%
home/index 33 ms 6.0%
layouts/application 39 ms 7.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.5%
layouts/application 32 ms 5.8%
home#slow 554 ms 100.0%
home#slow 554 ms 100.0%
home#slow 554 ms 100.0%
home#slow 554 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... 20 ms 3.6%
users/index 7 ms 1.3%
users/index 33 ms 6.0%