Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 4:11 AM
Duration
425.63 ms
Status
200
Response Size
110 KB
Error
No

Performance Breakdown

Database
5.7% (6 queries)
View Rendering
7.6%
Application Logic
86.6%
Other Operations
0.0%
Total Operations
19
Slowest Operation
425.63 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 614.0ms 1228.1ms 1842.1ms 2456.2ms

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 5 ms 1.2%
home#slow 426 ms 100.0%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 26 ms 6.1%
home/index 35 ms 8.2%
home#slow 426 ms 100.0%
home/index 36 ms 8.5%
users/index 31 ms 7.3%
SELECT name FROM users 17 ms 4.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 29 ms 6.8%
posts/show 7 ms 1.6%
home#slow 426 ms 100.0%
home#slow 426 ms 100.0%
home#slow 426 ms 100.0%
users/index 23 ms 5.4%
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... 22 ms 5.2%
users/index 18 ms 4.2%
SELECT name FROM users 12 ms 2.8%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 35 ms 8.2%
home/index 32 ms 7.5%