Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 10:06 AM
Duration
464.51 ms
Status
201
Response Size
110 KB
Error
No

Performance Breakdown

Database
4.6% (8 queries)
View Rendering
5.6%
Application Logic
89.8%
Other Operations
0.0%
Total Operations
23
Slowest Operation
464.51 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 905.4ms 1810.8ms 2716.2ms 3621.6ms

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 465 ms 100.0%
home#slow 465 ms 100.0%
home#slow 465 ms 100.0%
home#slow 465 ms 100.0%
SELECT * FROM users WHERE id = ? 17 ms 3.7%
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... 28 ms 6.0%
posts/show 13 ms 2.8%
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... 14 ms 3.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 4.3%
layouts/application 37 ms 8.0%
posts/show 5 ms 1.1%
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... 4 ms 0.9%
layouts/application 39 ms 8.4%
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... 32 ms 6.9%
home#slow 465 ms 100.0%
home/index 5 ms 1.1%
home/index 39 ms 8.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 17 ms 3.7%
layouts/application 37 ms 8.0%
SELECT * FROM posts WHERE created_at > ? 35 ms 7.5%
home#slow 465 ms 100.0%
home/index 28 ms 6.0%
home#slow 465 ms 100.0%