Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 2:22 PM
Duration
312.34 ms
Status
200
Response Size
120 KB
Error
No

Performance Breakdown

Database
7.0% (9 queries)
View Rendering
5.1%
Application Logic
87.9%
Other Operations
0.0%
Total Operations
24
Slowest Operation
312.34 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 799.5ms 1599.1ms 2398.6ms 3198.1ms

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 312 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 7.7%
layouts/application 18 ms 5.8%
home#slow 312 ms 100.0%
users/index 24 ms 7.7%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 12 ms 3.8%
SELECT name FROM users 17 ms 5.4%
users/index 30 ms 9.6%
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... 32 ms 10.2%
home#slow 312 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... 31 ms 9.9%
layouts/application 31 ms 9.9%
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... 29 ms 9.3%
home#slow 312 ms 100.0%
users/index 38 ms 12.2%
home/index 22 ms 7.0%
home#slow 312 ms 100.0%
home#slow 312 ms 100.0%
SELECT * FROM users WHERE id = ? 32 ms 10.2%
home#slow 312 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 23 ms 7.4%
home#slow 312 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 24 ms 7.7%
home#slow 312 ms 100.0%