Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 5:45 PM
Duration
417.24 ms
Status
201
Response Size
130 KB
Error
No

Performance Breakdown

Database
5.3% (7 queries)
View Rendering
6.5%
Application Logic
88.1%
Other Operations
0.0%
Total Operations
17
Slowest Operation
417.24 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 591.8ms 1183.6ms 1775.4ms 2367.2ms

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 417 ms 100.0%
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... 23 ms 5.5%
home/index 39 ms 9.3%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 11 ms 2.6%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 28 ms 6.7%
SELECT * FROM users WHERE id = ? 22 ms 5.3%
users/index 19 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 > ? 1 ms 0.2%
home#slow 417 ms 100.0%
home#slow 417 ms 100.0%
home/index 34 ms 8.1%
home#slow 417 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 22 ms 5.3%
home/index 32 ms 7.7%
posts/show 31 ms 7.4%
SELECT * FROM posts WHERE created_at > ? 19 ms 4.6%
home#slow 417 ms 100.0%