Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 6:59 PM
Duration
299.04 ms
Status
201
Response Size
150 KB
Error
No

Performance Breakdown

Database
3.8% (7 queries)
View Rendering
4.4%
Application Logic
91.9%
Other Operations
0.0%
Total Operations
27
Slowest Operation
299.04 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 976.4ms 1952.8ms 2929.1ms 3905.5ms

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
UPDATE posts SET view_count = view_count + ? WHERE published = ? 12 ms 4.0%
home#slow 299 ms 100.0%
users/index 26 ms 8.7%
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... 11 ms 3.7%
home/index 15 ms 5.0%
home#slow 299 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... 21 ms 7.0%
home/index 17 ms 5.7%
layouts/application 16 ms 5.4%
users/index 34 ms 11.4%
home#slow 299 ms 100.0%
home#slow 299 ms 100.0%
DELETE FROM comments WHERE created_at < ? 12 ms 4.0%
home#slow 299 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 26 ms 8.7%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 10.0%
home#slow 299 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 35 ms 11.7%
home#slow 299 ms 100.0%
home#slow 299 ms 100.0%
home#slow 299 ms 100.0%
home#slow 299 ms 100.0%
posts/show 12 ms 4.0%
home/index 28 ms 9.4%
home#slow 299 ms 100.0%
posts/show 22 ms 7.4%
home#slow 299 ms 100.0%