Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 8:40 AM
Duration
302.8 ms
Status
201
Response Size
190 KB
Error
No

Performance Breakdown

Database
2.5% (6 queries)
View Rendering
5.4%
Application Logic
92.1%
Other Operations
0.0%
Total Operations
25
Slowest Operation
302.8 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 904.4ms 1808.9ms 2713.3ms 3617.8ms

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
home#slow 303 ms 100.0%
layouts/application 17 ms 5.6%
posts/show 12 ms 4.0%
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... 33 ms 10.9%
layouts/application 33 ms 10.9%
layouts/application 34 ms 11.2%
layouts/application 33 ms 10.9%
home/index 23 ms 7.6%
home#slow 303 ms 100.0%
users/index 26 ms 8.6%
home#slow 303 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 2.0%
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... 1 ms 0.3%
home#slow 303 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 13 ms 4.3%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 22 ms 7.3%
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... 17 ms 5.6%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
home#slow 303 ms 100.0%
posts/show 17 ms 5.6%