Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 3:25 AM
Duration
408.77 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
5.0% (8 queries)
View Rendering
3.7%
Application Logic
91.3%
Other Operations
0.0%
Total Operations
21
Slowest Operation
408.77 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 783.4ms 1566.7ms 2350.1ms 3133.4ms

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 ? 10 ms 2.4%
layouts/application 33 ms 8.1%
posts/show 24 ms 5.9%
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... 23 ms 5.6%
home#slow 409 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.5%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 16 ms 3.9%
SELECT id, name, email FROM users WHERE id = ? 34 ms 8.3%
home#slow 409 ms 100.0%
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... 27 ms 6.6%
home#slow 409 ms 100.0%
home#slow 409 ms 100.0%
posts/show 7 ms 1.7%
home#slow 409 ms 100.0%
home#slow 409 ms 100.0%
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... 20 ms 4.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 6.1%
posts/show 29 ms 7.1%
home#slow 409 ms 100.0%
layouts/application 13 ms 3.2%
home/index 9 ms 2.2%