Request Details

Route
/slow GET
Timestamp
Sep 23, 2026 6:59 AM
Duration
357.21 ms
Status
204
Response Size
89 KB
Error
No

Performance Breakdown

Database
7.2% (10 queries)
View Rendering
7.3%
Application Logic
85.5%
Other Operations
0.0%
Total Operations
23
Slowest Operation
357.21 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 626.6ms 1253.1ms 1879.7ms 2506.2ms

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
layouts/application 29 ms 8.1%
home/index 39 ms 10.9%
posts/show 10 ms 2.8%
SELECT name FROM users 24 ms 6.7%
home#slow 357 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... 8 ms 2.2%
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... 33 ms 9.2%
SELECT name FROM users 14 ms 3.9%
home#slow 357 ms 100.0%
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... 25 ms 7.0%
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... 22 ms 6.2%
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 > ? 6 ms 1.7%
home#slow 357 ms 100.0%
posts/show 23 ms 6.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 2.5%
home/index 21 ms 5.9%
home#slow 357 ms 100.0%
SELECT name FROM users 32 ms 9.0%
home#slow 357 ms 100.0%
home#slow 357 ms 100.0%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 7 ms 2.0%
posts/show 23 ms 6.4%
home/index 38 ms 10.6%