Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 4:05 PM
Duration
291.22 ms
Status
201
Response Size
110 KB
Error
No

Performance Breakdown

Database
4.9% (11 queries)
View Rendering
6.4%
Application Logic
88.7%
Other Operations
0.0%
Total Operations
29
Slowest Operation
291.22 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 656.7ms 1313.4ms 1970.1ms 2626.7ms

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
home/index 28 ms 9.6%
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 > ? 14 ms 4.8%
posts/show 6 ms 2.1%
SELECT id, name, email FROM users WHERE id = ? 9 ms 3.1%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 9 ms 3.1%
users/index 17 ms 5.8%
home#slow 291 ms 100.0%
home/index 7 ms 2.4%
home#slow 291 ms 100.0%
posts/show 31 ms 10.6%
home/index 16 ms 5.5%
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... 8 ms 2.7%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 25 ms 8.6%
home/index 14 ms 4.8%
home#slow 291 ms 100.0%
users/index 5 ms 1.7%
home#slow 291 ms 100.0%
users/index 11 ms 3.8%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 2 ms 0.7%
DELETE FROM posts WHERE id = ? 3 ms 1.0%
SELECT * FROM users WHERE id = ? 7 ms 2.4%
home/index 32 ms 11.0%
home#slow 291 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 > ? 29 ms 10.0%
SELECT * FROM users WHERE id = ? 19 ms 6.5%
home#slow 291 ms 100.0%
home#slow 291 ms 100.0%
home#slow 291 ms 100.0%
SELECT name FROM users 5 ms 1.7%