Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 1:42 AM
Duration
307.15 ms
Status
201
Response Size
66 KB
Error
No

Performance Breakdown

Database
2.4% (5 queries)
View Rendering
2.9%
Application Logic
94.7%
Other Operations
0.0%
Total Operations
20
Slowest Operation
307.15 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 891.7ms 1783.3ms 2675.0ms 3566.7ms

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 18 ms 5.9%
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... 35 ms 11.4%
home#slow 307 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 5 ms 1.6%
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 > ? 23 ms 7.5%
home#slow 307 ms 100.0%
layouts/application 33 ms 10.7%
home#slow 307 ms 100.0%
home#slow 307 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... 3 ms 1.0%
home#slow 307 ms 100.0%
SELECT * FROM users WHERE id = ? 18 ms 5.9%
home#slow 307 ms 100.0%
home#slow 307 ms 100.0%
home#slow 307 ms 100.0%
home/index 13 ms 4.2%
home#slow 307 ms 100.0%
users/index 40 ms 13.0%
home#slow 307 ms 100.0%
home#slow 307 ms 100.0%