Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 1:00 PM
Duration
302.91 ms
Status
200
Response Size
110 KB
Error
No

Performance Breakdown

Database
3.6% (5 queries)
View Rendering
7.5%
Application Logic
88.9%
Other Operations
0.0%
Total Operations
20
Slowest Operation
302.91 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 596.3ms 1192.7ms 1789.0ms 2385.4ms

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 users WHERE id = ? 12 ms 4.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 7.6%
users/index 33 ms 10.9%
posts/show 5 ms 1.7%
home/index 40 ms 13.2%
home/index 25 ms 8.3%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
posts/show 28 ms 9.2%
SELECT * FROM users WHERE id = ? 21 ms 6.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 3.0%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 6.9%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
users/index 23 ms 7.6%
home#slow 303 ms 100.0%
home/index 19 ms 6.3%
home/index 6 ms 2.0%