Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 1:23 PM
Duration
385.57 ms
Status
201
Response Size
72 KB
Error
No

Performance Breakdown

Database
2.9% (6 queries)
View Rendering
6.3%
Application Logic
90.8%
Other Operations
0.0%
Total Operations
18
Slowest Operation
385.57 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 636.9ms 1273.7ms 1910.6ms 2547.4ms

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 386 ms 100.0%
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... 21 ms 5.4%
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... 8 ms 2.1%
posts/show 40 ms 10.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 14 ms 3.6%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 5.2%
home/index 15 ms 3.9%
layouts/application 32 ms 8.3%
DELETE FROM posts WHERE id = ? 2 ms 0.5%
home#slow 386 ms 100.0%
home#slow 386 ms 100.0%
home#slow 386 ms 100.0%
home#slow 386 ms 100.0%
home/index 24 ms 6.2%
posts/show 37 ms 9.6%
users/index 12 ms 3.1%
home#slow 386 ms 100.0%
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... 9 ms 2.3%