Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 9:29 PM
Duration
419.09 ms
Status
201
Response Size
170 KB
Error
No

Performance Breakdown

Database
1.8% (2 queries)
View Rendering
5.8%
Application Logic
92.4%
Other Operations
0.0%
Total Operations
18
Slowest Operation
419.09 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 793.9ms 1587.8ms 2381.7ms 3175.6ms

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 419 ms 100.0%
posts/show 26 ms 6.2%
home/index 25 ms 6.0%
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 > ? 30 ms 7.2%
home#slow 419 ms 100.0%
posts/show 19 ms 4.5%
layouts/application 21 ms 5.0%
home/index 29 ms 6.9%
layouts/application 22 ms 5.2%
home#slow 419 ms 100.0%
posts/show 7 ms 1.7%
home#slow 419 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 6.4%
home/index 11 ms 2.6%
users/index 25 ms 6.0%
home#slow 419 ms 100.0%
home#slow 419 ms 100.0%
home#slow 419 ms 100.0%