Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 11:45 PM
Duration
896.58 ms
Status
204
Response Size
180 KB
Error
No

Performance Breakdown

Database
1.1% (3 queries)
View Rendering
1.1%
Application Logic
97.8%
Other Operations
0.0%
Total Operations
15
Slowest Operation
896.58 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 1832.7ms 3665.3ms 5498.0ms 7330.7ms

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
users/index 13 ms 1.4%
SELECT id, name, email FROM users WHERE id = ? 33 ms 3.7%
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 > ? 15 ms 1.7%
home#slow 897 ms 100.0%
home#slow 897 ms 100.0%
home#slow 897 ms 100.0%
home#slow 897 ms 100.0%
users/index 30 ms 3.3%
home#slow 897 ms 100.0%
home#slow 897 ms 100.0%
home#slow 897 ms 100.0%
posts/show 5 ms 0.6%
posts/show 30 ms 3.3%
home#slow 897 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 3.6%