Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 4:26 AM
Duration
337.61 ms
Status
204
Response Size
150 KB
Error
No

Performance Breakdown

Database
6.1% (8 queries)
View Rendering
3.1%
Application Logic
90.8%
Other Operations
0.0%
Total Operations
16
Slowest Operation
337.61 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 557.9ms 1115.8ms 1673.7ms 2231.6ms

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#slow 338 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 28 ms 8.3%
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... 24 ms 7.1%
home#slow 338 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 23 ms 6.8%
home#slow 338 ms 100.0%
home/index 40 ms 11.8%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 4 ms 1.2%
home#slow 338 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 4 ms 1.2%
SELECT * FROM posts WHERE created_at > ? 15 ms 4.4%
SELECT name FROM users 16 ms 4.7%
users/index 29 ms 8.6%
home#slow 338 ms 100.0%
SELECT * FROM users WHERE id = ? 23 ms 6.8%
home#slow 338 ms 100.0%