Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 7:31 AM
Duration
396.11 ms
Status
204
Response Size
190 KB
Error
No

Performance Breakdown

Database
3.4% (7 queries)
View Rendering
0.3%
Application Logic
96.3%
Other Operations
0.0%
Total Operations
17
Slowest Operation
396.11 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 925.2ms 1850.5ms 2775.7ms 3701.0ms

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 5.8%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 6.3%
home#slow 396 ms 100.0%
home/index 11 ms 2.8%
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 > ? 18 ms 4.5%
home#slow 396 ms 100.0%
home#slow 396 ms 100.0%
home#slow 396 ms 100.0%
home#slow 396 ms 100.0%
SELECT name FROM users 6 ms 1.5%
SELECT name FROM users 21 ms 5.3%
home#slow 396 ms 100.0%
home#slow 396 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 > ? 19 ms 4.8%
SELECT id, name FROM users WHERE email = ? 13 ms 3.3%
home#slow 396 ms 100.0%
home#slow 396 ms 100.0%