Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 6:46 PM
Duration
304.56 ms
Status
201
Response Size
100 KB
Error
No

Performance Breakdown

Database
4.0% (8 queries)
View Rendering
2.8%
Application Logic
93.1%
Other Operations
0.0%
Total Operations
24
Slowest Operation
304.56 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 817.6ms 1635.3ms 2452.9ms 3270.6ms

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
layouts/application 27 ms 8.9%
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... 33 ms 10.8%
home#slow 305 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... 29 ms 9.5%
home#slow 305 ms 100.0%
users/index 27 ms 8.9%
home/index 9 ms 3.0%
SELECT * FROM users WHERE id = ? 12 ms 3.9%
posts/show 7 ms 2.3%
home#slow 305 ms 100.0%
home/index 18 ms 5.9%
home#slow 305 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... 22 ms 7.2%
home#slow 305 ms 100.0%
home#slow 305 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 7 ms 2.3%
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 5.6%
posts/show 5 ms 1.6%
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... 3 ms 1.0%
home#slow 305 ms 100.0%
home#slow 305 ms 100.0%
home#slow 305 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 3.0%
home#slow 305 ms 100.0%