Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 1:34 PM
Duration
359.94 ms
Status
200
Response Size
100 KB
Error
No

Performance Breakdown

Database
2.5% (5 queries)
View Rendering
1.2%
Application Logic
96.3%
Other Operations
0.0%
Total Operations
15
Slowest Operation
359.94 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 840.9ms 1681.7ms 2522.6ms 3363.5ms

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
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 4.2%
home#slow 360 ms 100.0%
home#slow 360 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 21 ms 5.8%
home/index 40 ms 11.1%
home#slow 360 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 8.6%
home#slow 360 ms 100.0%
home#slow 360 ms 100.0%
SELECT name FROM users 6 ms 1.7%
SELECT * FROM users WHERE id = ? 11 ms 3.1%
home#slow 360 ms 100.0%
home#slow 360 ms 100.0%
home#slow 360 ms 100.0%
home#slow 360 ms 100.0%