Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 12:02 PM
Duration
313.96 ms
Status
201
Response Size
100 KB
Error
No

Performance Breakdown

Database
5.0% (5 queries)
View Rendering
2.5%
Application Logic
92.4%
Other Operations
0.0%
Total Operations
16
Slowest Operation
313.96 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 679.4ms 1358.8ms 2038.3ms 2717.7ms

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#slow 314 ms 100.0%
home#slow 314 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 9.9%
home#slow 314 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... 34 ms 10.8%
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... 23 ms 7.3%
layouts/application 18 ms 5.7%
home#slow 314 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 28 ms 8.9%
home#slow 314 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... 21 ms 6.7%
home#slow 314 ms 100.0%
home#slow 314 ms 100.0%
home#slow 314 ms 100.0%
users/index 19 ms 6.1%
posts/show 32 ms 10.2%