Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 11:47 AM
Duration
283.31 ms
Status
200
Response Size
110 KB
Error
No

Performance Breakdown

Database
2.8% (3 queries)
View Rendering
4.6%
Application Logic
92.6%
Other Operations
0.0%
Total Operations
16
Slowest Operation
283.31 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 611.9ms 1223.7ms 1835.6ms 2447.4ms

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
posts/show 17 ms 6.0%
home#slow 283 ms 100.0%
home#slow 283 ms 100.0%
home#slow 283 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... 34 ms 12.0%
posts/show 32 ms 11.3%
home#slow 283 ms 100.0%
posts/show 5 ms 1.8%
home/index 36 ms 12.7%
home#slow 283 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.7%
home#slow 283 ms 100.0%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 32 ms 11.3%
home#slow 283 ms 100.0%
layouts/application 23 ms 8.1%
home#slow 283 ms 100.0%