Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 6:53 AM
Duration
446.72 ms
Status
200
Response Size
160 KB
Error
No

Performance Breakdown

Database
3.5% (8 queries)
View Rendering
12.1%
Application Logic
84.4%
Other Operations
0.0%
Total Operations
30
Slowest Operation
446.72 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 793.8ms 1587.6ms 2381.5ms 3175.3ms

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
home/index 19 ms 4.3%
users/index 25 ms 5.6%
layouts/application 9 ms 2.0%
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 0.2%
home/index 8 ms 1.8%
home/index 37 ms 8.3%
layouts/application 8 ms 1.8%
posts/show 39 ms 8.7%
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... 13 ms 2.9%
SELECT name FROM users 1 ms 0.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 26 ms 5.8%
home/index 37 ms 8.3%
layouts/application 9 ms 2.0%
home#slow 447 ms 100.0%
home#slow 447 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 4.5%
SELECT name FROM users 14 ms 3.1%
users/index 34 ms 7.6%
layouts/application 20 ms 4.5%
layouts/application 40 ms 9.0%
home#slow 447 ms 100.0%
layouts/application 28 ms 6.3%
home/index 17 ms 3.8%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 9 ms 2.0%
home#slow 447 ms 100.0%
layouts/application 29 ms 6.5%
home#slow 447 ms 100.0%
home#slow 447 ms 100.0%
layouts/application 26 ms 5.8%
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... 26 ms 5.8%