Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 1:16 AM
Duration
376.97 ms
Status
200
Response Size
85 KB
Error
No

Performance Breakdown

Database
2.5% (5 queries)
View Rendering
7.7%
Application Logic
89.8%
Other Operations
0.0%
Total Operations
24
Slowest Operation
376.97 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 839.2ms 1678.4ms 2517.6ms 3356.8ms

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
layouts/application 28 ms 7.4%
layouts/application 29 ms 7.7%
home#slow 377 ms 100.0%
users/index 23 ms 6.1%
home#slow 377 ms 100.0%
posts/show 39 ms 10.3%
home#slow 377 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 2.4%
users/index 36 ms 9.5%
home#slow 377 ms 100.0%
users/index 33 ms 8.8%
home#slow 377 ms 100.0%
layouts/application 15 ms 4.0%
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 > ? 35 ms 9.3%
SELECT * FROM posts WHERE created_at > ? 2 ms 0.5%
home/index 9 ms 2.4%
home#slow 377 ms 100.0%
home#slow 377 ms 100.0%
users/index 16 ms 4.2%
home/index 23 ms 6.1%
home/index 6 ms 1.6%
home#slow 377 ms 100.0%
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... 30 ms 8.0%
SELECT * FROM posts WHERE created_at > ? 8 ms 2.1%