Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 2:54 PM
Duration
461.93 ms
Status
201
Response Size
100 KB
Error
No

Performance Breakdown

Database
3.3% (6 queries)
View Rendering
4.7%
Application Logic
92.0%
Other Operations
0.0%
Total Operations
17
Slowest Operation
461.93 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 753.1ms 1506.3ms 2259.4ms 3012.6ms

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
home#slow 462 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... 17 ms 3.7%
SELECT * FROM users WHERE id = ? 14 ms 3.0%
posts/show 24 ms 5.2%
home#slow 462 ms 100.0%
home#slow 462 ms 100.0%
home#slow 462 ms 100.0%
home#slow 462 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 5.2%
home#slow 462 ms 100.0%
layouts/application 38 ms 8.2%
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... 31 ms 6.7%
posts/show 19 ms 4.1%
SELECT * FROM users WHERE id = ? 4 ms 0.9%
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... 8 ms 1.7%
home/index 39 ms 8.4%
home/index 23 ms 5.0%