Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 12:53 AM
Duration
492.98 ms
Status
201
Response Size
71 KB
Error
No

Performance Breakdown

Database
2.7% (10 queries)
View Rendering
1.7%
Application Logic
95.6%
Other Operations
0.0%
Total Operations
28
Slowest Operation
492.98 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 1675.5ms 3350.9ms 5026.4ms 6701.8ms

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 493 ms 100.0%
home#slow 493 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 17 ms 3.4%
layouts/application 24 ms 4.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 4.9%
home#slow 493 ms 100.0%
users/index 31 ms 6.3%
home#slow 493 ms 100.0%
home#slow 493 ms 100.0%
home#slow 493 ms 100.0%
home#slow 493 ms 100.0%
home#slow 493 ms 100.0%
home/index 17 ms 3.4%
posts/show 34 ms 6.9%
SELECT * FROM users WHERE id = ? 6 ms 1.2%
SELECT COUNT(*) FROM comments WHERE post_id = ? 2 ms 0.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 29 ms 5.9%
users/index 7 ms 1.4%
home#slow 493 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... 7 ms 1.4%
home#slow 493 ms 100.0%
home#slow 493 ms 100.0%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 24 ms 4.9%
SELECT * FROM users WHERE id = ? 18 ms 3.7%
home#slow 493 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 6.7%
home#slow 493 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 20 ms 4.1%