Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 9:03 AM
Duration
363.05 ms
Status
200
Response Size
78 KB
Error
No

Performance Breakdown

Database
4.3% (5 queries)
View Rendering
6.3%
Application Logic
89.4%
Other Operations
0.0%
Total Operations
16
Slowest Operation
363.05 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 507.6ms 1015.1ms 1522.7ms 2030.3ms

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 29 ms 8.0%
home#slow 363 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... 35 ms 9.6%
home#slow 363 ms 100.0%
home/index 7 ms 1.9%
home#slow 363 ms 100.0%
users/index 22 ms 6.1%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.8%
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... 20 ms 5.5%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 25 ms 6.9%
posts/show 9 ms 2.5%
home#slow 363 ms 100.0%
home/index 24 ms 6.6%
SELECT * FROM posts WHERE created_at > ? 5 ms 1.4%
home#slow 363 ms 100.0%
home/index 36 ms 9.9%