Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 12:39 AM
Duration
613.06 ms
Status
200
Response Size
120 KB
Error
No

Performance Breakdown

Database
3.0% (6 queries)
View Rendering
3.0%
Application Logic
94.0%
Other Operations
0.0%
Total Operations
18
Slowest Operation
613.06 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 1141.6ms 2283.2ms 3424.8ms 4566.4ms

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
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... 31 ms 5.1%
home#slow 613 ms 100.0%
home/index 25 ms 4.1%
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... 21 ms 3.4%
users/index 22 ms 3.6%
home#slow 613 ms 100.0%
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... 19 ms 3.1%
home#slow 613 ms 100.0%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 34 ms 5.5%
users/index 23 ms 3.8%
home#slow 613 ms 100.0%
home/index 34 ms 5.5%
home#slow 613 ms 100.0%
home#slow 613 ms 100.0%
users/index 34 ms 5.5%
home#slow 613 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 26 ms 4.2%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 6 ms 1.0%