Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 11:17 PM
Duration
198.53 ms
Status
200
Response Size
52 KB
Error
No

Performance Breakdown

Database
12.7% (9 queries)
View Rendering
5.0%
Application Logic
82.3%
Other Operations
0.0%
Total Operations
17
Slowest Operation
198.53 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 241.3ms 482.6ms 723.8ms 965.1ms

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
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 25 ms 12.6%
home#slow 199 ms 100.0%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 14 ms 7.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 3.0%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 2 ms 1.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 5 ms 2.5%
layouts/application 17 ms 8.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 13 ms 6.5%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 30 ms 15.1%
home#slow 199 ms 100.0%
layouts/application 17 ms 8.6%
SELECT name FROM users 11 ms 5.5%
users/index 6 ms 3.0%
home#slow 199 ms 100.0%
home#slow 199 ms 100.0%
SELECT * FROM users WHERE id = ? 17 ms 8.6%
layouts/application 8 ms 4.0%