Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 12:26 PM
Duration
352.55 ms
Status
200
Response Size
95 KB
Error
No

Performance Breakdown

Database
6.4% (7 queries)
View Rendering
2.0%
Application Logic
91.5%
Other Operations
0.0%
Total Operations
16
Slowest Operation
352.55 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 577.8ms 1155.6ms 1733.5ms 2311.3ms

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
home#slow 353 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 22 ms 6.2%
SELECT COUNT(*) FROM comments WHERE post_id = ? 31 ms 8.8%
home#slow 353 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 5 ms 1.4%
layouts/application 12 ms 3.4%
home#slow 353 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 19 ms 5.4%
home#slow 353 ms 100.0%
home#slow 353 ms 100.0%
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 > ? 26 ms 7.4%
users/index 23 ms 6.5%
home#slow 353 ms 100.0%
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 > ? 11 ms 3.1%
home/index 12 ms 3.4%
SELECT name FROM users 35 ms 9.9%