Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 12:04 AM
Duration
293.2 ms
Status
200
Response Size
140 KB
Error
No

Performance Breakdown

Database
7.4% (11 queries)
View Rendering
10.2%
Application Logic
82.4%
Other Operations
0.0%
Total Operations
28
Slowest Operation
293.2 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 622.6ms 1245.2ms 1867.8ms 2490.4ms

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 293 ms 100.0%
SELECT name FROM users 11 ms 3.8%
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... 11 ms 3.8%
home#slow 293 ms 100.0%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 18 ms 6.1%
users/index 14 ms 4.8%
layouts/application 37 ms 12.6%
home/index 36 ms 12.3%
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... 20 ms 6.8%
home#slow 293 ms 100.0%
posts/show 10 ms 3.4%
SELECT name FROM users 11 ms 3.8%
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... 26 ms 8.9%
posts/show 11 ms 3.8%
SELECT id, name FROM users WHERE email = ? 28 ms 9.5%
home/index 8 ms 2.7%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 14 ms 4.8%
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... 16 ms 5.5%
home#slow 293 ms 100.0%
layouts/application 40 ms 13.6%
home/index 26 ms 8.9%
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... 4 ms 1.4%
home#slow 293 ms 100.0%
home#slow 293 ms 100.0%
layouts/application 34 ms 11.6%
users/index 37 ms 12.6%
home#slow 293 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 26 ms 8.9%