Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 3:45 AM
Duration
254.49 ms
Status
200
Response Size
100 KB
Error
No

Performance Breakdown

Database
4.1% (5 queries)
View Rendering
6.1%
Application Logic
89.8%
Other Operations
0.0%
Total Operations
24
Slowest Operation
254.49 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 779.6ms 1559.2ms 2338.8ms 3118.4ms

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/index 8 ms 3.1%
posts/show 39 ms 15.3%
users/index 29 ms 11.4%
home#slow 254 ms 100.0%
layouts/application 16 ms 6.3%
home#slow 254 ms 100.0%
home#slow 254 ms 100.0%
posts/show 22 ms 8.6%
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... 14 ms 5.5%
layouts/application 36 ms 14.1%
home#slow 254 ms 100.0%
home#slow 254 ms 100.0%
home#slow 254 ms 100.0%
home#slow 254 ms 100.0%
home#slow 254 ms 100.0%
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... 24 ms 9.4%
home#slow 254 ms 100.0%
home#slow 254 ms 100.0%
SELECT name FROM users 27 ms 10.6%
SELECT * FROM posts WHERE created_at > ? 33 ms 13.0%
users/index 11 ms 4.3%
home#slow 254 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 12.2%
layouts/application 29 ms 11.4%