Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 6:53 PM
Duration
335.44 ms
Status
200
Response Size
190 KB
Error
No

Performance Breakdown

Database
3.4% (8 queries)
View Rendering
4.3%
Application Logic
92.3%
Other Operations
0.0%
Total Operations
30
Slowest Operation
335.44 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 908.6ms 1817.2ms 2725.8ms 3634.4ms

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 335 ms 100.0%
layouts/application 7 ms 2.1%
layouts/application 11 ms 3.3%
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... 32 ms 9.5%
home/index 10 ms 3.0%
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... 2 ms 0.6%
home#slow 335 ms 100.0%
posts/show 16 ms 4.8%
users/index 10 ms 3.0%
posts/show 7 ms 2.1%
home#slow 335 ms 100.0%
users/index 28 ms 8.3%
users/index 21 ms 6.3%
posts/show 6 ms 1.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 2.1%
home#slow 335 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 5.4%
home#slow 335 ms 100.0%
home#slow 335 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... 24 ms 7.2%
users/index 25 ms 7.5%
layouts/application 7 ms 2.1%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 1.8%
home/index 9 ms 2.7%
home#slow 335 ms 100.0%
home#slow 335 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... 32 ms 9.5%
home#slow 335 ms 100.0%
home#slow 335 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... 2 ms 0.6%