Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 4:35 PM
Duration
230.96 ms
Status
204
Response Size
160 KB
Error
No

Performance Breakdown

Database
11.5% (11 queries)
View Rendering
12.0%
Application Logic
76.4%
Other Operations
0.0%
Total Operations
27
Slowest Operation
230.96 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 453.2ms 906.4ms 1359.6ms 1812.8ms

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
home#slow 231 ms 100.0%
home/index 26 ms 11.3%
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... 15 ms 6.5%
layouts/application 9 ms 3.9%
SELECT * FROM users WHERE id = ? 17 ms 7.4%
home#slow 231 ms 100.0%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 3 ms 1.3%
home/index 29 ms 12.6%
layouts/application 25 ms 10.8%
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 > ? 34 ms 14.7%
DELETE FROM posts WHERE id = ? 23 ms 10.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 10.0%
home#slow 231 ms 100.0%
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... 35 ms 15.2%
users/index 10 ms 4.3%
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... 13 ms 5.6%
home/index 5 ms 2.2%
SELECT * FROM users WHERE id = ? 35 ms 15.2%
home#slow 231 ms 100.0%
home#slow 231 ms 100.0%
posts/show 32 ms 13.9%
home#slow 231 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 6 ms 2.6%
layouts/application 35 ms 15.2%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 5 ms 2.2%
layouts/application 18 ms 7.8%
users/index 29 ms 12.6%