Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 7:58 PM
Duration
215.0 ms
Status
200
Response Size
110 KB
Error
No

Performance Breakdown

Database
4.8% (7 queries)
View Rendering
9.8%
Application Logic
85.4%
Other Operations
0.0%
Total Operations
25
Slowest Operation
215.0 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 503.5ms 1007.0ms 1510.5ms 2014.0ms

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.* 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... 18 ms 8.4%
posts/show 7 ms 3.3%
home#slow 215 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... 9 ms 4.2%
home/index 16 ms 7.4%
home#slow 215 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 5 ms 2.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 8 ms 3.7%
home#slow 215 ms 100.0%
home#slow 215 ms 100.0%
home/index 5 ms 2.3%
SELECT * FROM users WHERE id = ? 6 ms 2.8%
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... 17 ms 7.9%
home#slow 215 ms 100.0%
layouts/application 23 ms 10.7%
home#slow 215 ms 100.0%
posts/show 15 ms 7.0%
users/index 29 ms 13.5%
layouts/application 31 ms 14.4%
layouts/application 31 ms 14.4%
home#slow 215 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 15.3%
users/index 29 ms 13.5%
layouts/application 12 ms 5.6%
home#slow 215 ms 100.0%