Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 8:13 AM
Duration
404.57 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
7.1% (8 queries)
View Rendering
3.0%
Application Logic
89.9%
Other Operations
0.0%
Total Operations
17
Slowest Operation
404.57 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 562.5ms 1124.9ms 1687.4ms 2249.9ms

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 posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 18 ms 4.4%
SELECT name FROM users 26 ms 6.4%
home#slow 405 ms 100.0%
home#slow 405 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... 12 ms 3.0%
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... 13 ms 3.2%
layouts/application 9 ms 2.2%
layouts/application 37 ms 9.1%
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 > ? 14 ms 3.5%
SELECT name FROM users 33 ms 8.2%
posts/show 15 ms 3.7%
posts/show 6 ms 1.5%
home#slow 405 ms 100.0%
home#slow 405 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 22 ms 5.4%
home#slow 405 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 22 ms 5.4%