Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 1:51 PM
Duration
333.62 ms
Status
200
Response Size
99 KB
Error
No

Performance Breakdown

Database
5.8% (7 queries)
View Rendering
5.1%
Application Logic
89.1%
Other Operations
0.0%
Total Operations
18
Slowest Operation
333.62 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 655.3ms 1310.7ms 1966.0ms 2621.4ms

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 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... 20 ms 6.0%
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... 27 ms 8.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 8 ms 2.4%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
users/index 37 ms 11.1%
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... 26 ms 7.8%
users/index 35 ms 10.5%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 6 ms 1.8%
home#slow 334 ms 100.0%
posts/show 39 ms 11.7%
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... 34 ms 10.2%
home#slow 334 ms 100.0%
posts/show 23 ms 6.9%
SELECT * FROM users WHERE id = ? 31 ms 9.3%
home#slow 334 ms 100.0%