Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 9:26 PM
Duration
1568.89 ms
Status
204
Response Size
95 KB
Error
No

Performance Breakdown

Database
0.9% (8 queries)
View Rendering
1.2%
Application Logic
97.9%
Other Operations
0.0%
Total Operations
29
Slowest Operation
1568.89 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 4405.9ms 8811.9ms 13217.8ms 17623.7ms

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
posts/show 11 ms 0.7%
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... 26 ms 1.7%
home#slow 1569 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.2%
home#slow 1569 ms 100.0%
home#slow 1569 ms 100.0%
home#slow 1569 ms 100.0%
layouts/application 11 ms 0.7%
layouts/application 33 ms 2.1%
home#slow 1569 ms 100.0%
posts/show 5 ms 0.3%
home#slow 1569 ms 100.0%
posts/show 11 ms 0.7%
layouts/application 40 ms 2.5%
home#slow 1569 ms 100.0%
home/index 22 ms 1.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 26 ms 1.7%
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... 18 ms 1.1%
home/index 7 ms 0.4%
SELECT * FROM users WHERE id = ? 32 ms 2.0%
posts/show 31 ms 2.0%
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 > ? 8 ms 0.5%
home#slow 1569 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... 11 ms 0.7%
home#slow 1569 ms 100.0%
home#slow 1569 ms 100.0%
home/index 40 ms 2.5%
SELECT name FROM users 31 ms 2.0%
home#slow 1569 ms 100.0%