Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 1:54 PM
Duration
165.67 ms
Status
200
Response Size
73 KB
Error
No

Performance Breakdown

Database
3.9% (5 queries)
View Rendering
11.7%
Application Logic
84.4%
Other Operations
0.0%
Total Operations
29
Slowest Operation
165.67 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 638.2ms 1276.3ms 1914.5ms 2552.7ms

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/index 35 ms 21.1%
home#slow 166 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 5.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 5.4%
DELETE FROM posts WHERE id = ? 33 ms 19.9%
home#slow 166 ms 100.0%
users/index 30 ms 18.1%
posts/show 13 ms 7.8%
home#slow 166 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... 14 ms 8.5%
home#slow 166 ms 100.0%
layouts/application 24 ms 14.5%
layouts/application 29 ms 17.5%
home#slow 166 ms 100.0%
home#slow 166 ms 100.0%
users/index 39 ms 23.5%
home#slow 166 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... 35 ms 21.1%
users/index 36 ms 21.7%
home#slow 166 ms 100.0%
home/index 5 ms 3.0%
layouts/application 23 ms 13.9%
posts/show 40 ms 24.1%
posts/show 25 ms 15.1%
home#slow 166 ms 100.0%
home#slow 166 ms 100.0%
home#slow 166 ms 100.0%
home#slow 166 ms 100.0%
home#slow 166 ms 100.0%