Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 6:18 PM
Duration
298.76 ms
Status
200
Response Size
49 KB
Error
No

Performance Breakdown

Database
6.1% (9 queries)
View Rendering
4.6%
Application Logic
89.3%
Other Operations
0.0%
Total Operations
25
Slowest Operation
298.76 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 752.7ms 1505.4ms 2258.1ms 3010.8ms

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
home#slow 299 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 27 ms 9.0%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 14 ms 4.7%
SELECT * FROM users WHERE id = ? 18 ms 6.0%
users/index 35 ms 11.7%
home#slow 299 ms 100.0%
home/index 10 ms 3.3%
home/index 40 ms 13.4%
home#slow 299 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... 22 ms 7.4%
home#slow 299 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... 24 ms 8.0%
layouts/application 8 ms 2.7%
home#slow 299 ms 100.0%
posts/show 26 ms 8.7%
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... 33 ms 11.0%
home#slow 299 ms 100.0%
home/index 10 ms 3.3%
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... 10 ms 3.3%
home#slow 299 ms 100.0%
home#slow 299 ms 100.0%
home/index 10 ms 3.3%
SELECT name FROM users 31 ms 10.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 4 ms 1.3%
home#slow 299 ms 100.0%