Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 2:12 AM
Duration
577.92 ms
Status
200
Response Size
110 KB
Error
No

Performance Breakdown

Database
4.4% (6 queries)
View Rendering
4.2%
Application Logic
91.4%
Other Operations
0.0%
Total Operations
17
Slowest Operation
577.92 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 790.4ms 1580.8ms 2371.2ms 3161.6ms

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
posts/show 5 ms 0.9%
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... 19 ms 3.3%
home#slow 578 ms 100.0%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 6 ms 1.0%
layouts/application 30 ms 5.2%
home#slow 578 ms 100.0%
home#slow 578 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... 33 ms 5.7%
home#slow 578 ms 100.0%
home#slow 578 ms 100.0%
home/index 31 ms 5.4%
SELECT name FROM users 26 ms 4.5%
users/index 25 ms 4.3%
SELECT name FROM users 34 ms 5.9%
SELECT * FROM users WHERE id = ? 20 ms 3.5%
layouts/application 18 ms 3.1%
home/index 25 ms 4.3%