Request Details

Route
/slow GET
Timestamp
Sep 20, 2026 6:35 PM
Duration
308.91 ms
Status
204
Response Size
140 KB
Error
No

Performance Breakdown

Database
11.5% (10 queries)
View Rendering
5.4%
Application Logic
83.1%
Other Operations
0.0%
Total Operations
18
Slowest Operation
308.91 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 371.7ms 743.3ms 1115.0ms 1486.6ms

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 309 ms 100.0%
users/index 17 ms 5.5%
users/index 13 ms 4.2%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 16 ms 5.2%
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... 11 ms 3.6%
home#slow 309 ms 100.0%
posts/show 38 ms 12.3%
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... 16 ms 5.2%
posts/show 12 ms 3.9%
SELECT id, name FROM users WHERE email = ? 2 ms 0.6%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 8.1%
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... 17 ms 5.5%
SELECT id, name, email FROM users WHERE id = ? 5 ms 1.6%
home#slow 309 ms 100.0%
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... 18 ms 5.8%
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... 34 ms 11.0%
home#slow 309 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 27 ms 8.7%