Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 3:41 AM
Duration
334.18 ms
Status
204
Response Size
140 KB
Error
No

Performance Breakdown

Database
6.7% (12 queries)
View Rendering
2.3%
Application Logic
91.0%
Other Operations
0.0%
Total Operations
26
Slowest Operation
334.18 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 918.5ms 1836.9ms 2755.4ms 3673.8ms

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 comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 5 ms 1.5%
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... 8 ms 2.4%
home#slow 334 ms 100.0%
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... 13 ms 3.9%
SELECT * FROM posts WHERE created_at > ? 32 ms 9.6%
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... 21 ms 6.3%
SELECT name FROM users 23 ms 6.9%
posts/show 22 ms 6.6%
SELECT * FROM users WHERE id = ? 34 ms 10.2%
posts/show 30 ms 9.0%
home#slow 334 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 19 ms 5.7%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
posts/show 26 ms 7.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 9.0%
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... 34 ms 10.2%
home#slow 334 ms 100.0%
layouts/application 7 ms 2.1%
home#slow 334 ms 100.0%
SELECT name FROM users 22 ms 6.6%
home#slow 334 ms 100.0%
home#slow 334 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... 6 ms 1.8%