Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 5:43 AM
Duration
402.22 ms
Status
204
Response Size
130 KB
Error
No

Performance Breakdown

Database
3.8% (9 queries)
View Rendering
4.7%
Application Logic
91.5%
Other Operations
0.0%
Total Operations
24
Slowest Operation
402.22 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 878.7ms 1757.4ms 2636.1ms 3514.8ms

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 posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 30 ms 7.5%
home#slow 402 ms 100.0%
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... 25 ms 6.2%
posts/show 34 ms 8.5%
home#slow 402 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.5%
SELECT * FROM users WHERE id = ? 24 ms 6.0%
home#slow 402 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... 26 ms 6.5%
users/index 37 ms 9.2%
home#slow 402 ms 100.0%
SELECT name FROM users 15 ms 3.7%
home#slow 402 ms 100.0%
layouts/application 28 ms 7.0%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 5 ms 1.2%
home/index 7 ms 1.7%
posts/show 22 ms 5.5%
home#slow 402 ms 100.0%
users/index 11 ms 2.7%
home/index 25 ms 6.2%
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... 1 ms 0.2%
DELETE FROM comments WHERE created_at < ? 5 ms 1.2%
home#slow 402 ms 100.0%
home#slow 402 ms 100.0%