Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 8:40 AM
Duration
359.56 ms
Status
204
Response Size
97 KB
Error
No

Performance Breakdown

Database
2.5% (5 queries)
View Rendering
5.5%
Application Logic
92.0%
Other Operations
0.0%
Total Operations
24
Slowest Operation
359.56 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 879.3ms 1758.5ms 2637.8ms 3517.0ms

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 360 ms 100.0%
users/index 9 ms 2.5%
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 > ? 6 ms 1.7%
home#slow 360 ms 100.0%
layouts/application 32 ms 8.9%
home#slow 360 ms 100.0%
posts/show 31 ms 8.6%
home/index 20 ms 5.6%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 14 ms 3.9%
home#slow 360 ms 100.0%
layouts/application 24 ms 6.7%
home#slow 360 ms 100.0%
posts/show 11 ms 3.1%
users/index 9 ms 2.5%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 25 ms 7.0%
home/index 9 ms 2.5%
home#slow 360 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 > ? 29 ms 8.1%
home#slow 360 ms 100.0%
SELECT name FROM users 15 ms 4.2%
home#slow 360 ms 100.0%
home#slow 360 ms 100.0%
layouts/application 35 ms 9.7%
layouts/application 12 ms 3.3%