Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 4:44 PM
Duration
217.47 ms
Status
503
Response Size
548 Bytes
Error
Yes

Performance Breakdown

Database
4.9% (4 queries)
View Rendering
16.8%
Application Logic
78.2%
Other Operations
0.0%
Total Operations
18
Slowest Operation
217.47 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 278.0ms 555.9ms 833.9ms 1111.9ms

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
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 > ? 17 ms 7.8%
home/index 5 ms 2.3%
home#slow 217 ms 100.0%
SELECT name FROM users 18 ms 8.3%
home#slow 217 ms 100.0%
home#slow 217 ms 100.0%
layouts/application 25 ms 11.5%
layouts/application 30 ms 13.8%
layouts/application 6 ms 2.8%
home#slow 217 ms 100.0%
layouts/application 11 ms 5.1%
home/index 6 ms 2.8%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 17 ms 7.8%
users/index 34 ms 15.6%
home/index 17 ms 7.8%
layouts/application 34 ms 15.6%
layouts/application 19 ms 8.7%
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... 3 ms 1.4%