Request Details

Route
/slow GET
Timestamp
Sep 23, 2026 5:56 AM
Duration
544.45 ms
Status
204
Response Size
100 KB
Error
No

Performance Breakdown

Database
3.5% (6 queries)
View Rendering
3.4%
Application Logic
93.1%
Other Operations
0.0%
Total Operations
19
Slowest Operation
544.45 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 1023.5ms 2047.1ms 3070.6ms 4094.1ms

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 * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 30 ms 5.5%
home#slow 544 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 8 ms 1.5%
posts/show 7 ms 1.3%
layouts/application 37 ms 6.8%
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 > ? 31 ms 5.7%
home#slow 544 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 21 ms 3.9%
home#slow 544 ms 100.0%
home#slow 544 ms 100.0%
home#slow 544 ms 100.0%
posts/show 22 ms 4.0%
layouts/application 23 ms 4.2%
home#slow 544 ms 100.0%
home#slow 544 ms 100.0%
users/index 20 ms 3.7%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 25 ms 4.6%
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 > ? 30 ms 5.5%
users/index 29 ms 5.3%