Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 7:44 PM
Duration
175.69 ms
Status
200
Response Size
220 KB
Error
No

Performance Breakdown

Database
14.6% (8 queries)
View Rendering
6.7%
Application Logic
78.7%
Other Operations
0.0%
Total Operations
17
Slowest Operation
175.69 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 279.1ms 558.2ms 837.3ms 1116.4ms

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... 11 ms 6.3%
home#slow 176 ms 100.0%
home#slow 176 ms 100.0%
SELECT id, name FROM users WHERE email = ? 4 ms 2.3%
home#slow 176 ms 100.0%
home#slow 176 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... 15 ms 8.5%
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 19.4%
SELECT * FROM posts WHERE created_at > ? 26 ms 14.8%
users/index 12 ms 6.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 29 ms 16.5%
layouts/application 28 ms 15.9%
home#slow 176 ms 100.0%
posts/show 28 ms 15.9%
SELECT * FROM posts WHERE created_at > ? 12 ms 6.8%
home/index 7 ms 4.0%
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... 32 ms 18.2%