Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 12:43 PM
Duration
253.9 ms
Status
204
Response Size
170 KB
Error
No

Performance Breakdown

Database
5.3% (5 queries)
View Rendering
9.3%
Application Logic
85.4%
Other Operations
0.0%
Total Operations
15
Slowest Operation
253.9 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 297.4ms 594.8ms 892.2ms 1189.6ms

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 users WHERE id = ? 22 ms 8.7%
home#slow 254 ms 100.0%
home/index 23 ms 9.1%
posts/show 39 ms 15.4%
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 9.5%
layouts/application 16 ms 6.3%
home#slow 254 ms 100.0%
home#slow 254 ms 100.0%
posts/show 22 ms 8.7%
posts/show 6 ms 2.4%
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 4.7%
home#slow 254 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... 4 ms 1.6%
posts/show 5 ms 2.0%
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 > ? 1 ms 0.4%