Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 10:32 PM
Duration
468.3 ms
Status
200
Response Size
210 KB
Error
No

Performance Breakdown

Database
2.9% (4 queries)
View Rendering
4.4%
Application Logic
92.7%
Other Operations
0.0%
Total Operations
15
Slowest Operation
468.3 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 757.7ms 1515.4ms 2273.1ms 3030.8ms

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
layouts/application 18 ms 3.8%
layouts/application 33 ms 7.0%
home#slow 468 ms 100.0%
home#slow 468 ms 100.0%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 30 ms 6.4%
layouts/application 33 ms 7.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 5.3%
home#slow 468 ms 100.0%
home#slow 468 ms 100.0%
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... 22 ms 4.7%
layouts/application 29 ms 6.2%
home#slow 468 ms 100.0%
home#slow 468 ms 100.0%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 11 ms 2.3%
posts/show 20 ms 4.3%