Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 10:51 AM
Duration
666.76 ms
Status
204
Response Size
66 KB
Error
No

Performance Breakdown

Database
2.5% (7 queries)
View Rendering
5.5%
Application Logic
91.9%
Other Operations
0.0%
Total Operations
27
Slowest Operation
666.76 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 1269.1ms 2538.1ms 3807.2ms 5076.3ms

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 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 > ? 24 ms 3.6%
home#slow 667 ms 100.0%
home/index 17 ms 2.5%
users/index 40 ms 6.0%
home#slow 667 ms 100.0%
home/index 34 ms 5.1%
home/index 17 ms 2.5%
home/index 5 ms 0.7%
SELECT name FROM users 26 ms 3.9%
users/index 37 ms 5.5%
home#slow 667 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 3.4%
posts/show 33 ms 4.9%
posts/show 25 ms 3.7%
users/index 8 ms 1.2%
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... 9 ms 1.3%
home#slow 667 ms 100.0%
users/index 7 ms 1.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 29 ms 4.3%
users/index 10 ms 1.5%
users/index 7 ms 1.0%
home#slow 667 ms 100.0%
layouts/application 40 ms 6.0%
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... 1 ms 0.1%
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... 17 ms 2.5%
home#slow 667 ms 100.0%
home#slow 667 ms 100.0%