Request Details

Route
/slow GET
Timestamp
Sep 23, 2026 12:43 AM
Duration
376.81 ms
Status
204
Response Size
170 KB
Error
No

Performance Breakdown

Database
2.3% (6 queries)
View Rendering
3.4%
Application Logic
94.2%
Other Operations
0.0%
Total Operations
23
Slowest Operation
376.81 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 999.5ms 1999.0ms 2998.5ms 3998.1ms

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 377 ms 100.0%
home#slow 377 ms 100.0%
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... 21 ms 5.6%
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... 17 ms 4.5%
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... 17 ms 4.5%
users/index 9 ms 2.4%
posts/show 22 ms 5.8%
home#slow 377 ms 100.0%
layouts/application 15 ms 4.0%
layouts/application 9 ms 2.4%
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 4.5%
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... 12 ms 3.2%
home#slow 377 ms 100.0%
home#slow 377 ms 100.0%
home#slow 377 ms 100.0%
SELECT * FROM users WHERE id = ? 9 ms 2.4%
home#slow 377 ms 100.0%
posts/show 23 ms 6.1%
home#slow 377 ms 100.0%
home/index 33 ms 8.8%
home#slow 377 ms 100.0%
home#slow 377 ms 100.0%
users/index 26 ms 6.9%