Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 12:59 AM
Duration
298.54 ms
Status
200
Response Size
130 KB
Error
No

Performance Breakdown

Database
14.8% (10 queries)
View Rendering
16.6%
Application Logic
68.6%
Other Operations
0.0%
Total Operations
22
Slowest Operation
298.54 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 326.4ms 652.8ms 979.2ms 1305.6ms

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 299 ms 100.0%
layouts/application 14 ms 4.7%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 15 ms 5.0%
SELECT * FROM users WHERE id = ? 31 ms 10.4%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 15 ms 5.0%
SELECT * FROM users WHERE id = ? 13 ms 4.4%
SELECT name FROM users 21 ms 7.0%
layouts/application 13 ms 4.4%
SELECT * FROM posts WHERE created_at > ? 22 ms 7.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 23 ms 7.7%
layouts/application 25 ms 8.4%
home/index 29 ms 9.7%
home#slow 299 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... 33 ms 11.1%
home#slow 299 ms 100.0%
posts/show 37 ms 12.4%
SELECT name FROM users 12 ms 4.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 8 ms 2.7%
home/index 34 ms 11.4%
home/index 25 ms 8.4%
home/index 11 ms 3.7%
users/index 29 ms 9.7%