Request Details

Route
/slow GET
Timestamp
Sep 23, 2026 4:47 AM
Duration
174.61 ms
Status
200
Response Size
70 KB
Error
No

Performance Breakdown

Database
10.6% (10 queries)
View Rendering
11.8%
Application Logic
77.7%
Other Operations
0.0%
Total Operations
29
Slowest Operation
174.61 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 449.7ms 899.4ms 1349.2ms 1798.9ms

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 12.0%
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... 11 ms 6.3%
layouts/application 34 ms 19.5%
SELECT * FROM users WHERE id = ? 22 ms 12.6%
SELECT name FROM users 34 ms 19.5%
home/index 6 ms 3.4%
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 > ? 4 ms 2.3%
SELECT * FROM users WHERE id = ? 11 ms 6.3%
layouts/application 40 ms 22.9%
home/index 6 ms 3.4%
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... 20 ms 11.5%
home#slow 175 ms 100.0%
home/index 5 ms 2.9%
SELECT * FROM posts WHERE created_at > ? 32 ms 18.3%
layouts/application 39 ms 22.3%
home#slow 175 ms 100.0%
home#slow 175 ms 100.0%
home#slow 175 ms 100.0%
home#slow 175 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 16 ms 9.2%
layouts/application 12 ms 6.9%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 19 ms 10.9%
layouts/application 15 ms 8.6%
home#slow 175 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 21 ms 12.0%
home#slow 175 ms 100.0%
home#slow 175 ms 100.0%
posts/show 11 ms 6.3%
posts/show 23 ms 13.2%