Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 2:59 AM
Duration
303.91 ms
Status
201
Response Size
65 KB
Error
No

Performance Breakdown

Database
6.5% (13 queries)
View Rendering
7.5%
Application Logic
86.0%
Other Operations
0.0%
Total Operations
28
Slowest Operation
303.91 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 706.8ms 1413.6ms 2120.5ms 2827.3ms

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 30 ms 9.9%
SELECT * FROM users WHERE id = ? 4 ms 1.3%
SELECT * FROM posts WHERE created_at > ? 27 ms 8.9%
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... 31 ms 10.2%
SELECT * FROM posts WHERE created_at > ? 13 ms 4.3%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 2.3%
DELETE FROM comments WHERE created_at < ? 33 ms 10.9%
SELECT * FROM posts WHERE created_at > ? 3 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... 1 ms 0.3%
home#slow 304 ms 100.0%
home#slow 304 ms 100.0%
layouts/application 26 ms 8.6%
SELECT * FROM users WHERE id = ? 19 ms 6.3%
posts/show 19 ms 6.3%
SELECT name FROM users 13 ms 4.3%
posts/show 35 ms 11.5%
users/index 40 ms 13.2%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 29 ms 9.5%
home#slow 304 ms 100.0%
home#slow 304 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 > ? 4 ms 1.3%
home#slow 304 ms 100.0%
home#slow 304 ms 100.0%
users/index 28 ms 9.2%
home#slow 304 ms 100.0%
SELECT * FROM users WHERE id = ? 1 ms 0.3%
home#slow 304 ms 100.0%
layouts/application 33 ms 10.9%