Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 1:12 AM
Duration
450.67 ms
Status
200
Response Size
110 KB
Error
No

Performance Breakdown

Database
5.4% (10 queries)
View Rendering
8.3%
Application Logic
86.3%
Other Operations
0.0%
Total Operations
27
Slowest Operation
450.67 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 783.0ms 1566.0ms 2349.0ms 3132.0ms

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/index 8 ms 1.8%
SELECT name FROM users 15 ms 3.3%
layouts/application 21 ms 4.7%
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 2.9%
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 > ? 3 ms 0.7%
home/index 39 ms 8.7%
posts/show 40 ms 8.9%
home#slow 451 ms 100.0%
SELECT * FROM users WHERE id = ? 27 ms 6.0%
SELECT * FROM posts WHERE created_at > ? 29 ms 6.4%
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... 30 ms 6.7%
DELETE FROM posts WHERE id = ? 21 ms 4.7%
home#slow 451 ms 100.0%
layouts/application 20 ms 4.4%
layouts/application 35 ms 7.8%
posts/show 19 ms 4.2%
home#slow 451 ms 100.0%
home#slow 451 ms 100.0%
layouts/application 17 ms 3.8%
home#slow 451 ms 100.0%
home/index 22 ms 4.9%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 26 ms 5.8%
home#slow 451 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... 2 ms 0.4%
posts/show 10 ms 2.2%
SELECT * FROM users WHERE id = ? 2 ms 0.4%
layouts/application 29 ms 6.4%