Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 8:51 AM
Duration
218.05 ms
Status
204
Response Size
160 KB
Error
No

Performance Breakdown

Database
5.9% (8 queries)
View Rendering
4.9%
Application Logic
89.3%
Other Operations
0.0%
Total Operations
21
Slowest Operation
218.05 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 427.3ms 854.7ms 1282.0ms 1709.4ms

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
home#slow 218 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 1 ms 0.5%
layouts/application 14 ms 6.4%
home#slow 218 ms 100.0%
home#slow 218 ms 100.0%
SELECT name FROM users 9 ms 4.1%
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... 19 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... 13 ms 6.0%
posts/show 16 ms 7.3%
home#slow 218 ms 100.0%
home#slow 218 ms 100.0%
posts/show 8 ms 3.7%
SELECT id, name, email FROM users WHERE id = ? 19 ms 8.7%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 16 ms 7.3%
SELECT * FROM posts WHERE created_at > ? 4 ms 1.8%
posts/show 8 ms 3.7%
home#slow 218 ms 100.0%
home/index 6 ms 2.8%
users/index 31 ms 14.2%
home#slow 218 ms 100.0%
SELECT name FROM users 19 ms 8.7%