Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 11:22 PM
Duration
565.49 ms
Status
204
Response Size
160 KB
Error
No

Performance Breakdown

Database
1.2% (6 queries)
View Rendering
1.6%
Application Logic
97.2%
Other Operations
0.0%
Total Operations
30
Slowest Operation
565.49 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 2328.2ms 4656.4ms 6984.6ms 9312.8ms

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 * FROM posts WHERE created_at > ? 35 ms 6.2%
layouts/application 19 ms 3.4%
home#slow 565 ms 100.0%
layouts/application 23 ms 4.1%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
layouts/application 29 ms 5.1%
home#slow 565 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 14 ms 2.5%
home#slow 565 ms 100.0%
home/index 16 ms 2.8%
home#slow 565 ms 100.0%
layouts/application 5 ms 0.9%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 23 ms 4.1%
layouts/application 39 ms 6.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 4.4%
home/index 11 ms 1.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 1.2%
layouts/application 9 ms 1.6%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
home#slow 565 ms 100.0%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 10 ms 1.8%