Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 3:53 AM
Duration
286.69 ms
Status
201
Response Size
72 KB
Error
No

Performance Breakdown

Database
6.1% (8 queries)
View Rendering
0.8%
Application Logic
93.1%
Other Operations
0.0%
Total Operations
18
Slowest Operation
286.69 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 692.8ms 1385.6ms 2078.4ms 2771.2ms

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
home#slow 287 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 24 ms 8.4%
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... 13 ms 4.5%
home#slow 287 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 9.4%
home#slow 287 ms 100.0%
home#slow 287 ms 100.0%
home#slow 287 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... 23 ms 8.0%
SELECT * FROM users WHERE id = ? 29 ms 10.1%
home#slow 287 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... 18 ms 6.3%
home#slow 287 ms 100.0%
home#slow 287 ms 100.0%
home/index 23 ms 8.0%
home#slow 287 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... 22 ms 7.7%
SELECT id, name, email FROM users WHERE id = ? 12 ms 4.2%