Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 12:43 PM
Duration
374.09 ms
Status
201
Response Size
160 KB
Error
No

Performance Breakdown

Database
1.6% (3 queries)
View Rendering
3.8%
Application Logic
94.6%
Other Operations
0.0%
Total Operations
19
Slowest Operation
374.09 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 889.9ms 1779.9ms 2669.8ms 3559.8ms

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 374 ms 100.0%
posts/show 24 ms 6.4%
home#slow 374 ms 100.0%
users/index 27 ms 7.2%
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... 27 ms 7.2%
home#slow 374 ms 100.0%
home#slow 374 ms 100.0%
layouts/application 14 ms 3.7%
home#slow 374 ms 100.0%
home#slow 374 ms 100.0%
users/index 9 ms 2.4%
home/index 21 ms 5.6%
home#slow 374 ms 100.0%
home#slow 374 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 28 ms 7.5%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.8%
home#slow 374 ms 100.0%
layouts/application 29 ms 7.8%
users/index 11 ms 2.9%