Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 10:00 PM
Duration
233.98 ms
Status
201
Response Size
140 KB
Error
No

Performance Breakdown

Database
9.5% (7 queries)
View Rendering
3.5%
Application Logic
87.0%
Other Operations
0.0%
Total Operations
18
Slowest Operation
233.98 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 470.5ms 940.9ms 1411.4ms 1881.9ms

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 234 ms 100.0%
home#slow 234 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... 34 ms 14.5%
home#slow 234 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 11.5%
home/index 18 ms 7.7%
layouts/application 11 ms 4.7%
home#slow 234 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 11.1%
home#slow 234 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 30 ms 12.8%
users/index 12 ms 5.1%
users/index 24 ms 10.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 9.8%
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... 8 ms 3.4%
home#slow 234 ms 100.0%
home#slow 234 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 13.2%