Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 6:41 AM
Duration
669.1 ms
Status
201
Response Size
53 KB
Error
No

Performance Breakdown

Database
2.2% (5 queries)
View Rendering
1.9%
Application Logic
95.9%
Other Operations
0.0%
Total Operations
16
Slowest Operation
669.1 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 1220.9ms 2441.8ms 3662.8ms 4883.7ms

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 669 ms 100.0%
posts/show 36 ms 5.4%
home#slow 669 ms 100.0%
home/index 10 ms 1.5%
home#slow 669 ms 100.0%
SELECT * FROM users WHERE id = ? 4 ms 0.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 4.8%
home/index 35 ms 5.2%
home#slow 669 ms 100.0%
posts/show 10 ms 1.5%
SELECT name FROM users 19 ms 2.8%
home#slow 669 ms 100.0%
SELECT * FROM users WHERE id = ? 27 ms 4.0%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 27 ms 4.0%
home#slow 669 ms 100.0%
home#slow 669 ms 100.0%