Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 5:31 AM
Duration
552.38 ms
Status
204
Response Size
68 KB
Error
No

Performance Breakdown

Database
3.0% (9 queries)
View Rendering
2.0%
Application Logic
95.0%
Other Operations
0.0%
Total Operations
28
Slowest Operation
552.38 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 1744.6ms 3489.3ms 5233.9ms 6978.6ms

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/index 21 ms 3.8%
home#slow 552 ms 100.0%
home#slow 552 ms 100.0%
home#slow 552 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... 22 ms 4.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 5.4%
home#slow 552 ms 100.0%
layouts/application 16 ms 2.9%
home#slow 552 ms 100.0%
users/index 5 ms 0.9%
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 > ? 34 ms 6.2%
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 > ? 25 ms 4.5%
home#slow 552 ms 100.0%
home#slow 552 ms 100.0%
users/index 19 ms 3.4%
layouts/application 33 ms 6.0%
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... 15 ms 2.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 11 ms 2.0%
home#slow 552 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 5.8%
home#slow 552 ms 100.0%
home#slow 552 ms 100.0%
users/index 31 ms 5.6%
home#slow 552 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 32 ms 5.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 1.3%
home#slow 552 ms 100.0%
posts/show 17 ms 3.1%