Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 5:51 PM
Duration
256.65 ms
Status
201
Response Size
99 KB
Error
No

Performance Breakdown

Database
4.8% (8 queries)
View Rendering
7.1%
Application Logic
88.1%
Other Operations
0.0%
Total Operations
25
Slowest Operation
256.65 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 655.5ms 1310.9ms 1966.4ms 2621.8ms

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
layouts/application 6 ms 2.3%
home#slow 257 ms 100.0%
layouts/application 40 ms 15.6%
SELECT name FROM users 8 ms 3.1%
home/index 37 ms 14.4%
SELECT name FROM users 12 ms 4.7%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 29 ms 11.3%
home/index 20 ms 7.8%
home#slow 257 ms 100.0%
layouts/application 15 ms 5.8%
home#slow 257 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... 19 ms 7.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 2 ms 0.8%
home/index 22 ms 8.6%
layouts/application 25 ms 9.7%
home#slow 257 ms 100.0%
layouts/application 21 ms 8.2%
home#slow 257 ms 100.0%
home#slow 257 ms 100.0%
home#slow 257 ms 100.0%
DELETE FROM comments WHERE created_at < ? 10 ms 3.9%
home#slow 257 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 30 ms 11.7%
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... 16 ms 6.2%
home#slow 257 ms 100.0%