Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 4:42 AM
Duration
160.89 ms
Status
201
Response Size
90 KB
Error
No

Performance Breakdown

Database
8.2% (8 queries)
View Rendering
7.8%
Application Logic
83.9%
Other Operations
0.0%
Total Operations
25
Slowest Operation
160.89 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 479.2ms 958.4ms 1437.7ms 1916.9ms

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
users/index 22 ms 13.7%
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... 24 ms 14.9%
home#slow 161 ms 100.0%
home#slow 161 ms 100.0%
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... 33 ms 20.5%
SELECT * FROM users WHERE id = ? 20 ms 12.4%
layouts/application 8 ms 5.0%
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... 12 ms 7.5%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 16 ms 9.9%
home#slow 161 ms 100.0%
home#slow 161 ms 100.0%
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... 27 ms 16.8%
home#slow 161 ms 100.0%
home#slow 161 ms 100.0%
home#slow 161 ms 100.0%
home#slow 161 ms 100.0%
users/index 40 ms 24.9%
users/index 10 ms 6.2%
home#slow 161 ms 100.0%
layouts/application 28 ms 17.4%
layouts/application 18 ms 11.2%
users/index 24 ms 14.9%
SELECT id, name, email FROM users WHERE id = ? 11 ms 6.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 9.3%
home#slow 161 ms 100.0%