Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 11:31 PM
Duration
300.23 ms
Status
204
Response Size
120 KB
Error
No

Performance Breakdown

Database
3.7% (7 queries)
View Rendering
5.5%
Application Logic
90.8%
Other Operations
0.0%
Total Operations
24
Slowest Operation
300.23 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 826.6ms 1653.2ms 2479.7ms 3306.3ms

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
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 27 ms 9.0%
layouts/application 33 ms 11.0%
home#slow 300 ms 100.0%
home#slow 300 ms 100.0%
home#slow 300 ms 100.0%
home#slow 300 ms 100.0%
posts/show 30 ms 10.0%
layouts/application 33 ms 11.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 5.0%
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 300 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 1.0%
home/index 35 ms 11.7%
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... 27 ms 9.0%
home#slow 300 ms 100.0%
home#slow 300 ms 100.0%
posts/show 17 ms 5.7%
SELECT DISTINCT users.*, posts.*, comments.* FROM users, posts, comments WHERE users.id = posts.user_id AND posts.id = comments.post_id AND users.created_at > ? AND posts.created_at > ? AND comments.created_at > ? 29 ms 9.7%
home#slow 300 ms 100.0%
home/index 10 ms 3.3%
home#slow 300 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... 19 ms 6.3%
home#slow 300 ms 100.0%
layouts/application 25 ms 8.3%