Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 12:27 AM
Duration
265.78 ms
Status
204
Response Size
87 KB
Error
No

Performance Breakdown

Database
8.9% (11 queries)
View Rendering
9.3%
Application Logic
81.8%
Other Operations
0.0%
Total Operations
30
Slowest Operation
265.78 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 649.6ms 1299.1ms 1948.7ms 2598.3ms

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 * 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 12.8%
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... 8 ms 3.0%
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... 27 ms 10.2%
layouts/application 37 ms 13.9%
home/index 16 ms 6.0%
home#slow 266 ms 100.0%
layouts/application 14 ms 5.3%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 16 ms 6.0%
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... 9 ms 3.4%
home/index 10 ms 3.8%
SELECT name FROM users 34 ms 12.8%
home#slow 266 ms 100.0%
users/index 21 ms 7.9%
home#slow 266 ms 100.0%
home#slow 266 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 11.7%
home#slow 266 ms 100.0%
users/index 39 ms 14.7%
home#slow 266 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 31 ms 11.7%
layouts/application 37 ms 13.9%
users/index 16 ms 6.0%
SELECT id, name, email FROM users WHERE id = ? 10 ms 3.8%
layouts/application 27 ms 10.2%
users/index 10 ms 3.8%
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 > ? 10 ms 3.8%
SELECT name FROM users 20 ms 7.5%
home#slow 266 ms 100.0%
home/index 15 ms 5.6%
home#slow 266 ms 100.0%