Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 9:18 PM
Duration
351.43 ms
Status
200
Response Size
72 KB
Error
No

Performance Breakdown

Database
3.4% (7 queries)
View Rendering
4.2%
Application Logic
92.4%
Other Operations
0.0%
Total Operations
22
Slowest Operation
351.43 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 855.7ms 1711.4ms 2567.2ms 3422.9ms

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 31 ms 8.8%
users/index 28 ms 8.0%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 27 ms 7.7%
home#slow 351 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 13 ms 3.7%
home#slow 351 ms 100.0%
home#slow 351 ms 100.0%
home#slow 351 ms 100.0%
SELECT name FROM users 11 ms 3.1%
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... 15 ms 4.3%
home#slow 351 ms 100.0%
users/index 13 ms 3.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 26 ms 7.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 12 ms 3.4%
home#slow 351 ms 100.0%
home#slow 351 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... 12 ms 3.4%
users/index 39 ms 11.1%
home#slow 351 ms 100.0%
home/index 19 ms 5.4%
users/index 14 ms 4.0%
home#slow 351 ms 100.0%