Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 5:05 AM
Duration
569.35 ms
Status
200
Response Size
190 KB
Error
No

Performance Breakdown

Database
1.7% (7 queries)
View Rendering
2.1%
Application Logic
96.2%
Other Operations
0.0%
Total Operations
29
Slowest Operation
569.35 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 1923.6ms 3847.3ms 5770.9ms 7694.5ms

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
posts/show 22 ms 3.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 8 ms 1.4%
SELECT name FROM users 23 ms 4.0%
home#slow 569 ms 100.0%
home#slow 569 ms 100.0%
home#slow 569 ms 100.0%
home#slow 569 ms 100.0%
DELETE FROM posts WHERE id = ? 2 ms 0.4%
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... 26 ms 4.6%
home#slow 569 ms 100.0%
home/index 10 ms 1.8%
home#slow 569 ms 100.0%
home#slow 569 ms 100.0%
posts/show 15 ms 2.6%
home#slow 569 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... 17 ms 3.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 35 ms 6.1%
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... 20 ms 3.5%
home/index 12 ms 2.1%
posts/show 25 ms 4.4%
home/index 18 ms 3.2%
home#slow 569 ms 100.0%
home#slow 569 ms 100.0%
home#slow 569 ms 100.0%
home/index 36 ms 6.3%
posts/show 15 ms 2.6%
layouts/application 9 ms 1.6%
home#slow 569 ms 100.0%
home#slow 569 ms 100.0%