Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 2:43 AM
Duration
547.13 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
2.9% (9 queries)
View Rendering
3.9%
Application Logic
93.2%
Other Operations
0.0%
Total Operations
28
Slowest Operation
547.13 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 1321.0ms 2642.1ms 3963.1ms 5284.2ms

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
SELECT name FROM users 22 ms 4.0%
home#slow 547 ms 100.0%
home/index 33 ms 6.0%
home#slow 547 ms 100.0%
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... 25 ms 4.6%
home#slow 547 ms 100.0%
home#slow 547 ms 100.0%
home#slow 547 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 3 ms 0.5%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 3 ms 0.5%
home/index 36 ms 6.6%
SELECT * FROM posts WHERE created_at > ? 4 ms 0.7%
SELECT * FROM users WHERE id = ? 30 ms 5.5%
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... 35 ms 6.4%
posts/show 29 ms 5.3%
posts/show 12 ms 2.2%
posts/show 8 ms 1.5%
home/index 22 ms 4.0%
home#slow 547 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 4.4%
home#slow 547 ms 100.0%
users/index 28 ms 5.1%
home/index 17 ms 3.1%
home#slow 547 ms 100.0%
users/index 14 ms 2.6%
home/index 6 ms 1.1%
home#slow 547 ms 100.0%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 9 ms 1.6%