Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 7:07 PM
Duration
458.63 ms
Status
200
Response Size
130 KB
Error
No

Performance Breakdown

Database
1.6% (6 queries)
View Rendering
2.6%
Application Logic
95.8%
Other Operations
0.0%
Total Operations
28
Slowest Operation
458.63 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 1795.6ms 3591.2ms 5386.8ms 7182.4ms

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
posts/show 26 ms 5.7%
layouts/application 40 ms 8.7%
home/index 23 ms 5.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 5.2%
SELECT name FROM users 29 ms 6.3%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
users/index 16 ms 3.5%
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... 21 ms 4.6%
DELETE FROM posts WHERE id = ? 9 ms 2.0%
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... 5 ms 1.1%
home#slow 459 ms 100.0%
SELECT name FROM users 25 ms 5.5%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
users/index 35 ms 7.6%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
layouts/application 28 ms 6.1%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
home#slow 459 ms 100.0%
users/index 22 ms 4.8%