Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 5:31 AM
Duration
311.41 ms
Status
204
Response Size
85 KB
Error
No

Performance Breakdown

Database
4.7% (5 queries)
View Rendering
10.8%
Application Logic
84.5%
Other Operations
0.0%
Total Operations
22
Slowest Operation
311.41 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 553.1ms 1106.2ms 1659.3ms 2212.4ms

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
users/index 17 ms 5.5%
users/index 17 ms 5.5%
home#slow 311 ms 100.0%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 22 ms 7.1%
home/index 7 ms 2.2%
home/index 37 ms 11.9%
home#slow 311 ms 100.0%
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... 9 ms 2.9%
home#slow 311 ms 100.0%
layouts/application 21 ms 6.7%
home#slow 311 ms 100.0%
home/index 9 ms 2.9%
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... 34 ms 10.9%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 19 ms 6.1%
home#slow 311 ms 100.0%
home/index 32 ms 10.3%
SELECT id, name, email FROM users WHERE id = ? 20 ms 6.4%
home#slow 311 ms 100.0%
users/index 31 ms 10.0%
layouts/application 26 ms 8.3%
users/index 20 ms 6.4%
home/index 23 ms 7.4%