Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 3:44 PM
Duration
390.68 ms
Status
200
Response Size
100 KB
Error
No

Performance Breakdown

Database
7.6% (6 queries)
View Rendering
5.4%
Application Logic
87.0%
Other Operations
0.0%
Total Operations
17
Slowest Operation
390.68 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 561.1ms 1122.2ms 1683.3ms 2244.4ms

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 391 ms 100.0%
home#slow 391 ms 100.0%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 31 ms 7.9%
posts/show 32 ms 8.2%
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 8.7%
home/index 15 ms 3.8%
layouts/application 26 ms 6.7%
home#slow 391 ms 100.0%
layouts/application 9 ms 2.3%
layouts/application 10 ms 2.6%
users/index 29 ms 7.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 23 ms 5.9%
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... 15 ms 3.8%
SELECT name FROM users 32 ms 8.2%
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... 35 ms 9.0%
home#slow 391 ms 100.0%
home#slow 391 ms 100.0%