Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 8:01 PM
Duration
185.31 ms
Status
200
Response Size
150 KB
Error
No

Performance Breakdown

Database
4.5% (7 queries)
View Rendering
10.4%
Application Logic
85.1%
Other Operations
0.0%
Total Operations
30
Slowest Operation
185.31 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 652.9ms 1305.9ms 1958.8ms 2611.7ms

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 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... 11 ms 5.9%
SELECT name FROM users 25 ms 13.5%
home/index 36 ms 19.4%
home#slow 185 ms 100.0%
home#slow 185 ms 100.0%
home#slow 185 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 14.6%
users/index 11 ms 5.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 1.1%
home#slow 185 ms 100.0%
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... 17 ms 9.2%
home#slow 185 ms 100.0%
home/index 22 ms 11.9%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 31 ms 16.7%
posts/show 30 ms 16.2%
home#slow 185 ms 100.0%
home#slow 185 ms 100.0%
home/index 25 ms 13.5%
layouts/application 35 ms 18.9%
users/index 34 ms 18.3%
home#slow 185 ms 100.0%
users/index 27 ms 14.6%
home#slow 185 ms 100.0%
home#slow 185 ms 100.0%
posts/show 11 ms 5.9%
layouts/application 22 ms 11.9%
home#slow 185 ms 100.0%
users/index 18 ms 9.7%
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... 4 ms 2.2%
home#slow 185 ms 100.0%