Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 7:18 PM
Duration
402.08 ms
Status
204
Response Size
110 KB
Error
No

Performance Breakdown

Database
1.9% (4 queries)
View Rendering
2.6%
Application Logic
95.5%
Other Operations
0.0%
Total Operations
16
Slowest Operation
402.08 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 841.9ms 1683.8ms 2525.8ms 3367.7ms

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
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 5.7%
home#slow 402 ms 100.0%
users/index 29 ms 7.2%
layouts/application 7 ms 1.7%
home#slow 402 ms 100.0%
home#slow 402 ms 100.0%
users/index 15 ms 3.7%
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... 20 ms 5.0%
home#slow 402 ms 100.0%
home#slow 402 ms 100.0%
SELECT name FROM users 18 ms 4.5%
users/index 35 ms 8.7%
home#slow 402 ms 100.0%
home#slow 402 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 4 ms 1.0%
home#slow 402 ms 100.0%