Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 4:53 AM
Duration
419.77 ms
Status
200
Response Size
140 KB
Error
No

Performance Breakdown

Database
0.5% (2 queries)
View Rendering
4.4%
Application Logic
95.1%
Other Operations
0.0%
Total Operations
22
Slowest Operation
419.77 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 1103.2ms 2206.4ms 3309.5ms 4412.7ms

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
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 14 ms 3.3%
home#slow 420 ms 100.0%
SELECT * FROM users WHERE id = ? 9 ms 2.1%
home#slow 420 ms 100.0%
layouts/application 8 ms 1.9%
home#slow 420 ms 100.0%
home/index 27 ms 6.4%
layouts/application 13 ms 3.1%
home#slow 420 ms 100.0%
home#slow 420 ms 100.0%
users/index 12 ms 2.9%
home#slow 420 ms 100.0%
home#slow 420 ms 100.0%
users/index 8 ms 1.9%
home#slow 420 ms 100.0%
home#slow 420 ms 100.0%
home/index 24 ms 5.7%
layouts/application 24 ms 5.7%
home/index 12 ms 2.9%
posts/show 40 ms 9.5%
layouts/application 24 ms 5.7%
home#slow 420 ms 100.0%