Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 7:21 PM
Duration
220.4 ms
Status
200
Response Size
130 KB
Error
No

Performance Breakdown

Database
4.5% (8 queries)
View Rendering
8.2%
Application Logic
87.2%
Other Operations
0.0%
Total Operations
27
Slowest Operation
220.4 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 694.8ms 1389.7ms 2084.5ms 2779.4ms

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
home#slow 220 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... 23 ms 10.4%
DELETE FROM posts WHERE id = ? 21 ms 9.5%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 6 ms 2.7%
home#slow 220 ms 100.0%
home#slow 220 ms 100.0%
home/index 37 ms 16.8%
home#slow 220 ms 100.0%
home/index 14 ms 6.4%
home#slow 220 ms 100.0%
home/index 8 ms 3.6%
SELECT name FROM users 4 ms 1.8%
home#slow 220 ms 100.0%
SELECT * FROM users WHERE id = ? 34 ms 15.4%
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 > ? 14 ms 6.4%
home/index 40 ms 18.1%
home#slow 220 ms 100.0%
home#slow 220 ms 100.0%
SELECT name FROM users 23 ms 10.4%
home#slow 220 ms 100.0%
home#slow 220 ms 100.0%
layouts/application 32 ms 14.5%
posts/show 25 ms 11.3%
home#slow 220 ms 100.0%
SELECT name FROM users 1 ms 0.5%
users/index 40 ms 18.1%
home/index 33 ms 15.0%