Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 9:55 PM
Duration
279.11 ms
Status
201
Response Size
96 KB
Error
No

Performance Breakdown

Database
5.9% (7 queries)
View Rendering
7.2%
Application Logic
86.9%
Other Operations
0.0%
Total Operations
29
Slowest Operation
279.11 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 802.8ms 1605.6ms 2408.3ms 3211.1ms

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
users/index 15 ms 5.4%
posts/show 26 ms 9.3%
layouts/application 20 ms 7.2%
users/index 15 ms 5.4%
home#slow 279 ms 100.0%
home/index 31 ms 11.1%
home#slow 279 ms 100.0%
home#slow 279 ms 100.0%
layouts/application 34 ms 12.2%
home#slow 279 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... 22 ms 7.9%
layouts/application 7 ms 2.5%
layouts/application 9 ms 3.2%
home#slow 279 ms 100.0%
users/index 17 ms 6.1%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 28 ms 10.0%
posts/show 9 ms 3.2%
SELECT * FROM posts WHERE created_at > ? 19 ms 6.8%
home#slow 279 ms 100.0%
home#slow 279 ms 100.0%
home#slow 279 ms 100.0%
users/index 9 ms 3.2%
home#slow 279 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 12.5%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 18 ms 6.4%
SELECT name FROM users 32 ms 11.5%
SELECT id, name FROM users WHERE email = ? 34 ms 12.2%
home#slow 279 ms 100.0%
users/index 40 ms 14.3%