Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 7:56 PM
Duration
248.98 ms
Status
200
Response Size
62 KB
Error
No

Performance Breakdown

Database
3.5% (5 queries)
View Rendering
7.2%
Application Logic
89.3%
Other Operations
0.0%
Total Operations
17
Slowest Operation
248.98 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 488.0ms 975.9ms 1463.9ms 1951.9ms

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 ? 16 ms 6.4%
posts/show 31 ms 12.5%
home#slow 249 ms 100.0%
SELECT * FROM users WHERE id = ? 12 ms 4.8%
users/index 24 ms 9.6%
home#slow 249 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 12.0%
posts/show 39 ms 15.7%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 8 ms 3.2%
home#slow 249 ms 100.0%
home#slow 249 ms 100.0%
DELETE FROM comments WHERE created_at < ? 3 ms 1.2%
home#slow 249 ms 100.0%
posts/show 10 ms 4.0%
layouts/application 36 ms 14.5%
home#slow 249 ms 100.0%
home#slow 249 ms 100.0%