Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 1:19 PM
Duration
380.76 ms
Status
200
Response Size
210 KB
Error
No

Performance Breakdown

Database
4.4% (10 queries)
View Rendering
6.2%
Application Logic
89.4%
Other Operations
0.0%
Total Operations
29
Slowest Operation
380.76 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 958.2ms 1916.4ms 2874.6ms 3832.8ms

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 18 ms 4.7%
posts/show 8 ms 2.1%
home#slow 381 ms 100.0%
home/index 39 ms 10.2%
home#slow 381 ms 100.0%
layouts/application 30 ms 7.9%
home#slow 381 ms 100.0%
layouts/application 13 ms 3.4%
layouts/application 33 ms 8.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 7.1%
home#slow 381 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 5 ms 1.3%
home#slow 381 ms 100.0%
posts/show 37 ms 9.7%
home#slow 381 ms 100.0%
layouts/application 26 ms 6.8%
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... 29 ms 7.6%
SELECT name FROM users 25 ms 6.6%
SELECT name FROM users 13 ms 3.4%
DELETE FROM comments WHERE created_at < ? 29 ms 7.6%
users/index 17 ms 4.5%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 2 ms 0.5%
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... 29 ms 7.6%
home#slow 381 ms 100.0%
home#slow 381 ms 100.0%
home/index 15 ms 3.9%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 7 ms 1.8%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 4 ms 1.1%
home#slow 381 ms 100.0%