Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 10:46 PM
Duration
308.62 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
4.0% (8 queries)
View Rendering
6.6%
Application Logic
89.4%
Other Operations
0.0%
Total Operations
29
Slowest Operation
308.62 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 949.2ms 1898.4ms 2847.7ms 3796.9ms

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
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 28 ms 9.1%
layouts/application 15 ms 4.9%
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... 21 ms 6.8%
layouts/application 37 ms 12.0%
users/index 22 ms 7.1%
home#slow 309 ms 100.0%
posts/show 36 ms 11.7%
SELECT * FROM users WHERE id = ? 20 ms 6.5%
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... 28 ms 9.1%
home#slow 309 ms 100.0%
home#slow 309 ms 100.0%
layouts/application 29 ms 9.4%
users/index 25 ms 8.1%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 26 ms 8.4%
home#slow 309 ms 100.0%
home/index 32 ms 10.4%
home#slow 309 ms 100.0%
layouts/application 5 ms 1.6%
home#slow 309 ms 100.0%
home#slow 309 ms 100.0%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 11 ms 3.6%
home#slow 309 ms 100.0%
home#slow 309 ms 100.0%
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... 8 ms 2.6%
home#slow 309 ms 100.0%
users/index 29 ms 9.4%
DELETE FROM comments WHERE created_at < ? 10 ms 3.2%
layouts/application 20 ms 6.5%
home#slow 309 ms 100.0%