Request Details

Route
/slow GET
Timestamp
Sep 24, 2026 2:18 AM
Duration
545.55 ms
Status
200
Response Size
150 KB
Error
No

Performance Breakdown

Database
5.7% (6 queries)
View Rendering
6.4%
Application Logic
87.9%
Other Operations
0.0%
Total Operations
17
Slowest Operation
545.55 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 620.8ms 1241.6ms 1862.4ms 2483.2ms

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 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... 25 ms 4.6%
layouts/application 14 ms 2.6%
home/index 31 ms 5.7%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 3.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 4.9%
home/index 38 ms 7.0%
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 > ? 24 ms 4.4%
layouts/application 22 ms 4.0%
home#slow 546 ms 100.0%
home#slow 546 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... 13 ms 2.4%
posts/show 17 ms 3.1%
SELECT * FROM users WHERE id = ? 34 ms 6.2%
home#slow 546 ms 100.0%
home#slow 546 ms 100.0%
users/index 25 ms 4.6%
users/index 13 ms 2.4%