Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 12:52 PM
Duration
338.95 ms
Status
201
Response Size
48 KB
Error
No

Performance Breakdown

Database
5.8% (10 queries)
View Rendering
3.2%
Application Logic
90.9%
Other Operations
0.0%
Total Operations
27
Slowest Operation
338.95 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 932.1ms 1864.3ms 2796.4ms 3728.5ms

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 3.2%
home#slow 339 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 12 ms 3.5%
posts/show 17 ms 5.0%
posts/show 24 ms 7.1%
home#slow 339 ms 100.0%
users/index 6 ms 1.8%
users/index 24 ms 7.1%
SELECT id, name, email FROM users WHERE id = ? 10 ms 3.0%
home#slow 339 ms 100.0%
layouts/application 22 ms 6.5%
SELECT * FROM posts WHERE created_at > ? 34 ms 10.0%
home#slow 339 ms 100.0%
home#slow 339 ms 100.0%
SELECT * FROM users WHERE id = ? 34 ms 10.0%
home#slow 339 ms 100.0%
home#slow 339 ms 100.0%
home#slow 339 ms 100.0%
SELECT name FROM users 32 ms 9.4%
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... 20 ms 5.9%
SELECT * FROM users WHERE id = ? 29 ms 8.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 16 ms 4.7%
home/index 17 ms 5.0%
home#slow 339 ms 100.0%
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 > ? 7 ms 2.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 7.1%
home#slow 339 ms 100.0%