Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 9:27 AM
Duration
557.78 ms
Status
200
Response Size
62 KB
Error
No

Performance Breakdown

Database
0.6% (2 queries)
View Rendering
1.9%
Application Logic
97.4%
Other Operations
0.0%
Total Operations
27
Slowest Operation
557.78 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 2146.9ms 4293.8ms 6440.8ms 8587.7ms

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
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home/index 9 ms 1.6%
layouts/application 12 ms 2.2%
posts/show 19 ms 3.4%
layouts/application 29 ms 5.2%
home#slow 558 ms 100.0%
posts/show 19 ms 3.4%
home/index 22 ms 3.9%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
home#slow 558 ms 100.0%
layouts/application 7 ms 1.3%
home#slow 558 ms 100.0%
home/index 15 ms 2.7%
home#slow 558 ms 100.0%
layouts/application 23 ms 4.1%
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 > ? 24 ms 4.3%
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... 31 ms 5.6%
users/index 11 ms 2.0%
home#slow 558 ms 100.0%