Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 1:08 PM
Duration
295.64 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
3.1% (7 queries)
View Rendering
2.4%
Application Logic
94.5%
Other Operations
0.0%
Total Operations
16
Slowest Operation
295.64 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 547.6ms 1095.2ms 1642.9ms 2190.5ms

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 comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.7%
home#slow 296 ms 100.0%
home#slow 296 ms 100.0%
home#slow 296 ms 100.0%
home#slow 296 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... 32 ms 10.8%
home#slow 296 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... 15 ms 5.1%
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... 5 ms 1.7%
users/index 28 ms 9.5%
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... 6 ms 2.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 2.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.7%
layouts/application 25 ms 8.5%
home#slow 296 ms 100.0%
home#slow 296 ms 100.0%