Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 3:59 AM
Duration
259.69 ms
Status
201
Response Size
110 KB
Error
No

Performance Breakdown

Database
6.4% (7 queries)
View Rendering
8.0%
Application Logic
85.6%
Other Operations
0.0%
Total Operations
22
Slowest Operation
259.69 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 531.2ms 1062.4ms 1593.6ms 2124.8ms

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
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... 1 ms 0.4%
home#slow 260 ms 100.0%
users/index 10 ms 3.9%
home#slow 260 ms 100.0%
home#slow 260 ms 100.0%
home/index 36 ms 13.9%
layouts/application 33 ms 12.7%
home#slow 260 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 32 ms 12.3%
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... 20 ms 7.7%
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 > ? 21 ms 8.1%
home#slow 260 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 8.9%
home/index 26 ms 10.0%
home#slow 260 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 6.9%
users/index 25 ms 9.6%
home/index 6 ms 2.3%
layouts/application 6 ms 2.3%
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... 21 ms 8.1%
posts/show 29 ms 11.2%
home#slow 260 ms 100.0%