Request Details

Route
/slow GET
Timestamp
Sep 20, 2026 3:35 AM
Duration
589.92 ms
Status
200
Response Size
62 KB
Error
No

Performance Breakdown

Database
3.7% (7 queries)
View Rendering
2.4%
Application Logic
94.0%
Other Operations
0.0%
Total Operations
18
Slowest Operation
589.92 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 784.6ms 1569.3ms 2353.9ms 3138.6ms

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 comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 1.5%
home#slow 590 ms 100.0%
users/index 23 ms 3.9%
users/index 15 ms 2.5%
layouts/application 6 ms 1.0%
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... 25 ms 4.2%
home#slow 590 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 3.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 23 ms 3.9%
SELECT name FROM users 20 ms 3.4%
layouts/application 9 ms 1.5%
users/index 6 ms 1.0%
SELECT name FROM users 13 ms 2.2%
users/index 15 ms 2.5%
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 > ? 5 ms 0.8%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%
home#slow 590 ms 100.0%