Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 3:33 PM
Duration
325.2 ms
Status
204
Response Size
99 KB
Error
No

Performance Breakdown

Database
3.3% (8 queries)
View Rendering
5.1%
Application Logic
91.6%
Other Operations
0.0%
Total Operations
28
Slowest Operation
325.2 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 1064.9ms 2129.7ms 3194.6ms 4259.4ms

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
users/index 28 ms 8.6%
layouts/application 5 ms 1.5%
home#slow 325 ms 100.0%
posts/show 28 ms 8.6%
users/index 29 ms 8.9%
home#slow 325 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... 25 ms 7.7%
SELECT * FROM posts WHERE created_at > ? 23 ms 7.1%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 10 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... 31 ms 9.5%
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... 27 ms 8.3%
home#slow 325 ms 100.0%
home#slow 325 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 2.8%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 1 ms 0.3%
home#slow 325 ms 100.0%
home#slow 325 ms 100.0%
home/index 27 ms 8.3%
posts/show 39 ms 12.0%
home#slow 325 ms 100.0%
users/index 40 ms 12.3%
home#slow 325 ms 100.0%
home#slow 325 ms 100.0%
home#slow 325 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 > ? 13 ms 4.0%
home#slow 325 ms 100.0%
home#slow 325 ms 100.0%
posts/show 22 ms 6.8%