Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 4:16 PM
Duration
368.18 ms
Status
201
Response Size
110 KB
Error
No

Performance Breakdown

Database
3.1% (6 queries)
View Rendering
4.3%
Application Logic
92.6%
Other Operations
0.0%
Total Operations
23
Slowest Operation
368.18 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 993.7ms 1987.4ms 2981.1ms 3974.8ms

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
posts/show 5 ms 1.4%
home/index 32 ms 8.7%
users/index 32 ms 8.7%
home#slow 368 ms 100.0%
home#slow 368 ms 100.0%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 28 ms 7.6%
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... 10 ms 2.7%
layouts/application 12 ms 3.3%
SELECT * FROM posts WHERE created_at > ? 23 ms 6.2%
home#slow 368 ms 100.0%
posts/show 33 ms 9.0%
home#slow 368 ms 100.0%
home#slow 368 ms 100.0%
SELECT * FROM users WHERE id = ? 31 ms 8.4%
home#slow 368 ms 100.0%
home#slow 368 ms 100.0%
home#slow 368 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 > ? 2 ms 0.5%
users/index 37 ms 10.0%
home#slow 368 ms 100.0%
home#slow 368 ms 100.0%
posts/show 18 ms 4.9%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 30 ms 8.1%