Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 3:55 AM
Duration
264.19 ms
Status
204
Response Size
75 KB
Error
No

Performance Breakdown

Database
3.7% (10 queries)
View Rendering
4.5%
Application Logic
91.8%
Other Operations
0.0%
Total Operations
29
Slowest Operation
264.19 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 935.6ms 1871.2ms 2806.9ms 3742.5ms

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 264 ms 100.0%
SELECT name FROM users 19 ms 7.2%
home/index 28 ms 10.6%
home/index 22 ms 8.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 13 ms 4.9%
home#slow 264 ms 100.0%
home#slow 264 ms 100.0%
home#slow 264 ms 100.0%
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... 5 ms 1.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 11 ms 4.2%
SELECT * FROM users WHERE id = ? 8 ms 3.0%
home#slow 264 ms 100.0%
home/index 25 ms 9.5%
SELECT name FROM users 21 ms 7.9%
layouts/application 34 ms 12.9%
layouts/application 24 ms 9.1%
home#slow 264 ms 100.0%
home#slow 264 ms 100.0%
home#slow 264 ms 100.0%
home#slow 264 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 7 ms 2.6%
SELECT * FROM posts WHERE created_at > ? 22 ms 8.3%
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... 2 ms 0.8%
home#slow 264 ms 100.0%
home#slow 264 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... 30 ms 11.4%
users/index 37 ms 14.0%
home#slow 264 ms 100.0%
home#slow 264 ms 100.0%