Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 7:48 AM
Duration
245.9 ms
Status
204
Response Size
60 KB
Error
No

Performance Breakdown

Database
5.0% (6 queries)
View Rendering
11.0%
Application Logic
84.0%
Other Operations
0.0%
Total Operations
19
Slowest Operation
245.9 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 365.9ms 731.8ms 1097.6ms 1463.5ms

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
SELECT * FROM posts WHERE created_at > ? 7 ms 2.8%
home#slow 246 ms 100.0%
layouts/application 39 ms 15.9%
home#slow 246 ms 100.0%
home#slow 246 ms 100.0%
home/index 25 ms 10.2%
home#slow 246 ms 100.0%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 10 ms 4.1%
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... 19 ms 7.7%
posts/show 6 ms 2.4%
posts/show 28 ms 11.4%
home/index 14 ms 5.7%
layouts/application 6 ms 2.4%
layouts/application 31 ms 12.6%
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... 5 ms 2.0%
home#slow 246 ms 100.0%
home/index 12 ms 4.9%
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... 27 ms 11.0%
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... 5 ms 2.0%