Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 7:49 PM
Duration
445.16 ms
Status
204
Response Size
78 KB
Error
No

Performance Breakdown

Database
5.2% (7 queries)
View Rendering
7.1%
Application Logic
87.7%
Other Operations
0.0%
Total Operations
23
Slowest Operation
445.16 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 761.2ms 1522.5ms 2283.7ms 3045.0ms

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
home/index 36 ms 8.1%
users/index 11 ms 2.5%
home/index 11 ms 2.5%
home#slow 445 ms 100.0%
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... 31 ms 7.0%
layouts/application 24 ms 5.4%
home#slow 445 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 11 ms 2.5%
home#slow 445 ms 100.0%
layouts/application 22 ms 4.9%
home#slow 445 ms 100.0%
layouts/application 40 ms 9.0%
SELECT id, name FROM users WHERE email = ? 4 ms 0.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 34 ms 7.6%
home/index 18 ms 4.0%
posts/show 17 ms 3.8%
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... 32 ms 7.2%
posts/show 14 ms 3.1%
home#slow 445 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... 18 ms 4.0%
home#slow 445 ms 100.0%
layouts/application 23 ms 5.2%
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... 28 ms 6.3%