Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 8:45 PM
Duration
375.34 ms
Status
201
Response Size
99 KB
Error
No

Performance Breakdown

Database
3.2% (11 queries)
View Rendering
3.6%
Application Logic
93.2%
Other Operations
0.0%
Total Operations
25
Slowest Operation
375.34 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 906.5ms 1813.0ms 2719.5ms 3626.0ms

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 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... 4 ms 1.1%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 2.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 4.8%
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... 14 ms 3.7%
home#slow 375 ms 100.0%
home#slow 375 ms 100.0%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 15 ms 4.0%
home#slow 375 ms 100.0%
home#slow 375 ms 100.0%
home#slow 375 ms 100.0%
layouts/application 21 ms 5.6%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 5.3%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 23 ms 6.1%
home#slow 375 ms 100.0%
home#slow 375 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... 1 ms 0.3%
home#slow 375 ms 100.0%
home#slow 375 ms 100.0%
home/index 26 ms 6.9%
layouts/application 35 ms 9.3%
layouts/application 9 ms 2.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.5%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 1.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 4 ms 1.1%
home/index 40 ms 10.7%