Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 11:47 AM
Duration
544.59 ms
Status
200
Response Size
77 KB
Error
No

Performance Breakdown

Database
2.8% (7 queries)
View Rendering
2.4%
Application Logic
94.7%
Other Operations
0.0%
Total Operations
21
Slowest Operation
544.59 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 1149.7ms 2299.4ms 3449.0ms 4598.7ms

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
home#slow 545 ms 100.0%
home#slow 545 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 26 ms 4.8%
home/index 23 ms 4.2%
home#slow 545 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... 31 ms 5.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 3.7%
posts/show 7 ms 1.3%
home#slow 545 ms 100.0%
home/index 29 ms 5.3%
home#slow 545 ms 100.0%
home#slow 545 ms 100.0%
layouts/application 10 ms 1.8%
SELECT id, name FROM users WHERE email = ? 2 ms 0.4%
SELECT name FROM users 16 ms 2.9%
SELECT * FROM posts WHERE created_at > ? 28 ms 5.1%
home#slow 545 ms 100.0%
users/index 32 ms 5.9%
SELECT * FROM posts WHERE created_at > ? 8 ms 1.5%
home#slow 545 ms 100.0%
posts/show 10 ms 1.8%