Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 1:41 AM
Duration
404.74 ms
Status
204
Response Size
220 KB
Error
No

Performance Breakdown

Database
5.6% (11 queries)
View Rendering
5.5%
Application Logic
88.9%
Other Operations
0.0%
Total Operations
25
Slowest Operation
404.74 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 796.8ms 1593.6ms 2390.4ms 3187.2ms

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/index 32 ms 7.9%
home#slow 405 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 16 ms 4.0%
home#slow 405 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 18 ms 4.4%
home#slow 405 ms 100.0%
home/index 25 ms 6.2%
home#slow 405 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 4.4%
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... 30 ms 7.4%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 28 ms 6.9%
home/index 5 ms 1.2%
posts/show 33 ms 8.2%
SELECT * FROM posts WHERE created_at > ? 11 ms 2.7%
posts/show 6 ms 1.5%
home/index 37 ms 9.1%
SELECT * FROM users WHERE id = ? 3 ms 0.7%
DELETE FROM comments WHERE created_at < ? 17 ms 4.2%
home#slow 405 ms 100.0%
SELECT name FROM users 17 ms 4.2%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 15 ms 3.7%
home#slow 405 ms 100.0%
layouts/application 36 ms 8.9%
home#slow 405 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 1.7%