Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 12:57 PM
Duration
651.23 ms
Status
204
Response Size
140 KB
Error
No

Performance Breakdown

Database
1.3% (5 queries)
View Rendering
5.2%
Application Logic
93.5%
Other Operations
0.0%
Total Operations
17
Slowest Operation
651.23 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 870.5ms 1741.1ms 2611.6ms 3482.1ms

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
home#slow 651 ms 100.0%
home/index 13 ms 2.0%
home#slow 651 ms 100.0%
users/index 25 ms 3.8%
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 0.3%
SELECT * FROM posts WHERE created_at > ? 19 ms 2.9%
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... 19 ms 2.9%
home#slow 651 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.5%
users/index 40 ms 6.1%
layouts/application 7 ms 1.1%
layouts/application 35 ms 5.4%
users/index 30 ms 4.6%
home#slow 651 ms 100.0%
SELECT name FROM users 3 ms 0.5%
home#slow 651 ms 100.0%
posts/show 30 ms 4.6%