Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 11:46 AM
Duration
581.57 ms
Status
204
Response Size
210 KB
Error
No

Performance Breakdown

Database
14.3% (12 queries)
View Rendering
9.7%
Application Logic
76.0%
Other Operations
0.0%
Total Operations
20
Slowest Operation
581.57 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 382.8ms 765.6ms 1148.4ms 1531.1ms

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 user_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 5.7%
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... 11 ms 1.9%
posts/show 22 ms 3.8%
users/index 23 ms 4.0%
DELETE FROM posts WHERE id = ? 31 ms 5.3%
layouts/application 15 ms 2.6%
users/index 40 ms 6.9%
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... 8 ms 1.4%
SELECT * FROM posts WHERE created_at > ? 15 ms 2.6%
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... 15 ms 2.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 4.1%
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 0.2%
layouts/application 30 ms 5.2%
home#slow 582 ms 100.0%
SELECT * FROM users WHERE id = ? 24 ms 4.1%
home#slow 582 ms 100.0%
DELETE FROM comments WHERE created_at < ? 25 ms 4.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 4.1%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 8 ms 1.4%
layouts/application 19 ms 3.3%