Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 10:00 PM
Duration
363.7 ms
Status
201
Response Size
130 KB
Error
No

Performance Breakdown

Database
10.8% (6 queries)
View Rendering
20.0%
Application Logic
69.2%
Other Operations
0.0%
Total Operations
16
Slowest Operation
363.7 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 262.6ms 525.2ms 787.8ms 1050.4ms

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
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... 20 ms 5.5%
home#slow 364 ms 100.0%
home#slow 364 ms 100.0%
users/index 22 ms 6.0%
home/index 38 ms 10.4%
posts/show 22 ms 6.0%
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... 7 ms 1.9%
SELECT * FROM users WHERE id = ? 34 ms 9.3%
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... 17 ms 4.7%
posts/show 30 ms 8.2%
layouts/application 19 ms 5.2%
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... 16 ms 4.4%
layouts/application 14 ms 3.8%
layouts/application 31 ms 8.5%
layouts/application 34 ms 9.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 19 ms 5.2%