Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 6:28 PM
Duration
308.45 ms
Status
204
Response Size
89 KB
Error
No

Performance Breakdown

Database
0.5% (2 queries)
View Rendering
3.4%
Application Logic
96.1%
Other Operations
0.0%
Total Operations
17
Slowest Operation
308.45 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 882.2ms 1764.5ms 2646.7ms 3528.9ms

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
layouts/application 30 ms 9.7%
SELECT id, name, email FROM users WHERE id = ? 8 ms 2.6%
home#slow 308 ms 100.0%
posts/show 30 ms 9.7%
home#slow 308 ms 100.0%
home#slow 308 ms 100.0%
home#slow 308 ms 100.0%
home#slow 308 ms 100.0%
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... 9 ms 2.9%
home#slow 308 ms 100.0%
home#slow 308 ms 100.0%
home#slow 308 ms 100.0%
posts/show 19 ms 6.2%
home#slow 308 ms 100.0%
home#slow 308 ms 100.0%
layouts/application 40 ms 13.0%
home#slow 308 ms 100.0%