Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 8:06 PM
Duration
294.42 ms
Status
204
Response Size
82 KB
Error
No

Performance Breakdown

Database
4.3% (6 queries)
View Rendering
7.2%
Application Logic
88.5%
Other Operations
0.0%
Total Operations
25
Slowest Operation
294.42 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 831.8ms 1663.6ms 2495.4ms 3327.2ms

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#slow 294 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 10.5%
SELECT name FROM users 33 ms 11.2%
home#slow 294 ms 100.0%
home/index 20 ms 6.8%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 12 ms 4.1%
posts/show 13 ms 4.4%
posts/show 35 ms 11.9%
home#slow 294 ms 100.0%
home#slow 294 ms 100.0%
posts/show 40 ms 13.6%
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... 30 ms 10.2%
home/index 8 ms 2.7%
home#slow 294 ms 100.0%
home#slow 294 ms 100.0%
users/index 31 ms 10.5%
posts/show 21 ms 7.1%
SELECT name FROM users 18 ms 6.1%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 19 ms 6.5%
home#slow 294 ms 100.0%
layouts/application 34 ms 11.5%
home#slow 294 ms 100.0%
home#slow 294 ms 100.0%
home#slow 294 ms 100.0%
posts/show 38 ms 12.9%