Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 7:34 AM
Duration
334.58 ms
Status
204
Response Size
100 KB
Error
No

Performance Breakdown

Database
3.1% (5 queries)
View Rendering
3.5%
Application Logic
93.4%
Other Operations
0.0%
Total Operations
16
Slowest Operation
334.58 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 626.8ms 1253.5ms 1880.3ms 2507.0ms

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 name FROM users 12 ms 3.6%
home#slow 335 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... 28 ms 8.4%
home/index 35 ms 10.5%
home#slow 335 ms 100.0%
users/index 36 ms 10.8%
layouts/application 6 ms 1.8%
home#slow 335 ms 100.0%
home#slow 335 ms 100.0%
home/index 11 ms 3.3%
home#slow 335 ms 100.0%
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 > ? 15 ms 4.5%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 12 ms 3.6%
home#slow 335 ms 100.0%
home#slow 335 ms 100.0%
DELETE FROM posts WHERE id = ? 10 ms 3.0%