Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 9:25 AM
Duration
558.7 ms
Status
201
Response Size
190 KB
Error
No

Performance Breakdown

Database
6.0% (8 queries)
View Rendering
4.2%
Application Logic
89.8%
Other Operations
0.0%
Total Operations
21
Slowest Operation
558.7 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 777.4ms 1554.7ms 2332.1ms 3109.5ms

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 559 ms 100.0%
users/index 26 ms 4.7%
home#slow 559 ms 100.0%
users/index 5 ms 0.9%
home#slow 559 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 21 ms 3.8%
posts/show 13 ms 2.3%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 21 ms 3.8%
layouts/application 25 ms 4.5%
SELECT name FROM users 35 ms 6.3%
SELECT * FROM posts WHERE created_at > ? 14 ms 2.5%
users/index 16 ms 2.9%
SELECT name FROM users 28 ms 5.0%
home/index 19 ms 3.4%
SELECT * FROM users WHERE id = ? 2 ms 0.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 5.5%
users/index 6 ms 1.1%
SELECT id, name FROM users WHERE email = ? 34 ms 6.1%
home#slow 559 ms 100.0%
home#slow 559 ms 100.0%
home/index 20 ms 3.6%