Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 6:31 AM
Duration
418.14 ms
Status
204
Response Size
72 KB
Error
No

Performance Breakdown

Database
3.1% (8 queries)
View Rendering
5.4%
Application Logic
91.5%
Other Operations
0.0%
Total Operations
27
Slowest Operation
418.14 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 1142.1ms 2284.2ms 3426.3ms 4568.4ms

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
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... 5 ms 1.2%
users/index 29 ms 6.9%
users/index 28 ms 6.7%
home#slow 418 ms 100.0%
home/index 26 ms 6.2%
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... 13 ms 3.1%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
users/index 29 ms 6.9%
layouts/application 37 ms 8.8%
home#slow 418 ms 100.0%
SELECT id, name FROM users WHERE email = ? 9 ms 2.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 7.9%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
layouts/application 19 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... 34 ms 8.1%
posts/show 33 ms 7.9%
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... 18 ms 4.3%
SELECT name FROM users 5 ms 1.2%
posts/show 6 ms 1.4%
home/index 38 ms 9.1%
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... 25 ms 6.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%