Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 9:26 PM
Duration
658.85 ms
Status
201
Response Size
210 KB
Error
No

Performance Breakdown

Database
10.4% (10 queries)
View Rendering
6.9%
Application Logic
82.6%
Other Operations
0.0%
Total Operations
21
Slowest Operation
658.85 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 597.9ms 1195.8ms 1793.7ms 2391.6ms

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
SELECT * FROM users WHERE id = ? 31 ms 4.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 1.4%
home#slow 659 ms 100.0%
home/index 17 ms 2.6%
home/index 34 ms 5.2%
posts/show 40 ms 6.1%
layouts/application 14 ms 2.1%
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... 32 ms 4.9%
layouts/application 5 ms 0.8%
posts/show 5 ms 0.8%
home#slow 659 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... 22 ms 3.3%
SELECT * FROM users WHERE id = ? 34 ms 5.2%
home#slow 659 ms 100.0%
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... 13 ms 2.0%
SELECT id, name, email FROM users WHERE id = ? 27 ms 4.1%
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... 12 ms 1.8%
layouts/application 30 ms 4.6%
SELECT * FROM posts WHERE created_at > ? 35 ms 5.3%
SELECT * FROM posts WHERE created_at > ? 34 ms 5.2%
layouts/application 21 ms 3.2%