Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 12:04 AM
Duration
590.32 ms
Status
200
Response Size
95 KB
Error
No

Performance Breakdown

Database
1.0% (3 queries)
View Rendering
2.0%
Application Logic
97.0%
Other Operations
0.0%
Total Operations
19
Slowest Operation
590.32 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 1521.5ms 3043.1ms 4564.6ms 6086.2ms

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.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 30 ms 5.1%
home#slow 590 ms 100.0%
posts/show 10 ms 1.7%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%
home/index 24 ms 4.1%
SELECT * FROM users WHERE id = ? 19 ms 3.2%
posts/show 40 ms 6.8%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%
layouts/application 23 ms 3.9%
posts/show 7 ms 1.2%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 11 ms 1.9%
layouts/application 19 ms 3.2%