Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 6:45 PM
Duration
382.85 ms
Status
201
Response Size
100 KB
Error
No

Performance Breakdown

Database
0.9% (3 queries)
View Rendering
6.1%
Application Logic
92.9%
Other Operations
0.0%
Total Operations
15
Slowest Operation
382.85 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 618.0ms 1236.0ms 1854.1ms 2472.1ms

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... 3 ms 0.8%
layouts/application 34 ms 8.9%
home#slow 383 ms 100.0%
posts/show 31 ms 8.1%
home#slow 383 ms 100.0%
layouts/application 15 ms 3.9%
SELECT id, name, email FROM users WHERE id = ? 12 ms 3.1%
home#slow 383 ms 100.0%
home#slow 383 ms 100.0%
layouts/application 21 ms 5.5%
users/index 26 ms 6.8%
users/index 25 ms 6.5%
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... 8 ms 2.1%
home#slow 383 ms 100.0%
home#slow 383 ms 100.0%