Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 12:36 AM
Duration
361.79 ms
Status
200
Response Size
100 KB
Error
No

Performance Breakdown

Database
2.7% (3 queries)
View Rendering
3.0%
Application Logic
94.3%
Other Operations
0.0%
Total Operations
18
Slowest Operation
361.79 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 863.3ms 1726.5ms 2589.8ms 3453.1ms

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
users/index 23 ms 6.4%
home#slow 362 ms 100.0%
layouts/application 15 ms 4.1%
home#slow 362 ms 100.0%
home#slow 362 ms 100.0%
home#slow 362 ms 100.0%
home/index 7 ms 1.9%
SELECT name FROM users 25 ms 6.9%
home#slow 362 ms 100.0%
users/index 17 ms 4.7%
posts/show 16 ms 4.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 9.1%
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... 35 ms 9.7%
home#slow 362 ms 100.0%
home#slow 362 ms 100.0%
home#slow 362 ms 100.0%
layouts/application 26 ms 7.2%
home#slow 362 ms 100.0%