Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 8:43 PM
Duration
461.36 ms
Status
201
Response Size
140 KB
Error
No

Performance Breakdown

Database
4.5% (8 queries)
View Rendering
2.9%
Application Logic
92.6%
Other Operations
0.0%
Total Operations
23
Slowest Operation
461.36 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 1121.1ms 2242.1ms 3363.2ms 4484.2ms

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
home/index 11 ms 2.4%
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... 34 ms 7.4%
SELECT * FROM users WHERE id = ? 22 ms 4.8%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 16 ms 3.5%
posts/show 15 ms 3.3%
layouts/application 17 ms 3.7%
home#slow 461 ms 100.0%
home#slow 461 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 33 ms 7.2%
layouts/application 32 ms 6.9%
SELECT name FROM users 15 ms 3.3%
home#slow 461 ms 100.0%
home#slow 461 ms 100.0%
SELECT * FROM users WHERE id = ? 33 ms 7.2%
home#slow 461 ms 100.0%
home#slow 461 ms 100.0%
home#slow 461 ms 100.0%
home/index 21 ms 4.6%
SELECT id, name, email FROM users WHERE id = ? 26 ms 5.6%
home/index 36 ms 7.8%
SELECT * FROM posts WHERE created_at > ? 21 ms 4.6%
home#slow 461 ms 100.0%
home#slow 461 ms 100.0%