Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 3:15 PM
Duration
287.77 ms
Status
204
Response Size
130 KB
Error
No

Performance Breakdown

Database
1.5% (4 queries)
View Rendering
4.1%
Application Logic
94.4%
Other Operations
0.0%
Total Operations
15
Slowest Operation
287.77 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 609.5ms 1219.1ms 1828.6ms 2438.2ms

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 288 ms 100.0%
home#slow 288 ms 100.0%
home#slow 288 ms 100.0%
home/index 29 ms 10.1%
home/index 39 ms 13.6%
home#slow 288 ms 100.0%
users/index 31 ms 10.8%
home#slow 288 ms 100.0%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 7 ms 2.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 12 ms 4.2%
home#slow 288 ms 100.0%
SELECT * FROM users WHERE id = ? 5 ms 1.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 13 ms 4.5%
home#slow 288 ms 100.0%
home#slow 288 ms 100.0%