Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 1:52 AM
Duration
164.6 ms
Status
204
Response Size
96 KB
Error
No

Performance Breakdown

Database
8.2% (8 queries)
View Rendering
12.2%
Application Logic
79.7%
Other Operations
0.0%
Total Operations
26
Slowest Operation
164.6 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 464.9ms 929.7ms 1394.6ms 1859.4ms

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 165 ms 100.0%
layouts/application 22 ms 13.4%
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... 17 ms 10.3%
posts/show 18 ms 10.9%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 9 ms 5.5%
home#slow 165 ms 100.0%
home#slow 165 ms 100.0%
home#slow 165 ms 100.0%
home#slow 165 ms 100.0%
SELECT * FROM users WHERE id = ? 23 ms 14.0%
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... 34 ms 20.7%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 8 ms 4.9%
layouts/application 27 ms 16.4%
layouts/application 19 ms 11.5%
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... 14 ms 8.5%
posts/show 38 ms 23.1%
home/index 35 ms 21.3%
posts/show 29 ms 17.6%
home#slow 165 ms 100.0%
layouts/application 18 ms 10.9%
home#slow 165 ms 100.0%
home#slow 165 ms 100.0%
layouts/application 20 ms 12.2%
SELECT name FROM users 27 ms 16.4%
home#slow 165 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 20 ms 12.2%