Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 8:48 PM
Duration
195.81 ms
Status
200
Response Size
89 KB
Error
No

Performance Breakdown

Database
3.8% (4 queries)
View Rendering
18.3%
Application Logic
77.8%
Other Operations
0.0%
Total Operations
27
Slowest Operation
195.81 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 503.1ms 1006.2ms 1509.3ms 2012.5ms

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 196 ms 100.0%
posts/show 32 ms 16.3%
home#slow 196 ms 100.0%
users/index 11 ms 5.6%
home/index 29 ms 14.8%
home#slow 196 ms 100.0%
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 > ? 24 ms 12.3%
home#slow 196 ms 100.0%
layouts/application 29 ms 14.8%
home#slow 196 ms 100.0%
home#slow 196 ms 100.0%
posts/show 12 ms 6.1%
layouts/application 8 ms 4.1%
home#slow 196 ms 100.0%
home/index 34 ms 17.4%
posts/show 24 ms 12.3%
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 > ? 28 ms 14.3%
layouts/application 30 ms 15.3%
SELECT * FROM posts WHERE created_at > ? 20 ms 10.2%
SELECT name FROM users 5 ms 2.6%
users/index 34 ms 17.4%
layouts/application 8 ms 4.1%
home/index 40 ms 20.4%
home#slow 196 ms 100.0%
users/index 12 ms 6.1%
layouts/application 30 ms 15.3%
users/index 36 ms 18.4%