Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 6:24 PM
Duration
340.63 ms
Status
204
Response Size
100 KB
Error
No

Performance Breakdown

Database
3.0% (9 queries)
View Rendering
3.5%
Application Logic
93.4%
Other Operations
0.0%
Total Operations
30
Slowest Operation
340.63 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 1184.8ms 2369.6ms 3554.4ms 4739.2ms

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 341 ms 100.0%
home#slow 341 ms 100.0%
home#slow 341 ms 100.0%
home/index 7 ms 2.1%
SELECT name FROM users 16 ms 4.7%
layouts/application 34 ms 10.0%
home#slow 341 ms 100.0%
posts/show 23 ms 6.8%
posts/show 32 ms 9.4%
home#slow 341 ms 100.0%
home#slow 341 ms 100.0%
home#slow 341 ms 100.0%
home#slow 341 ms 100.0%
home#slow 341 ms 100.0%
home#slow 341 ms 100.0%
posts/show 13 ms 3.8%
home#slow 341 ms 100.0%
home/index 10 ms 2.9%
SELECT id, name FROM users WHERE email = ? 17 ms 5.0%
home#slow 341 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 > ? 27 ms 7.9%
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... 13 ms 3.8%
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... 10 ms 2.9%
SELECT * FROM users WHERE id = ? 7 ms 2.1%
SELECT * FROM posts WHERE created_at > ? 22 ms 6.5%
users/index 9 ms 2.6%
home#slow 341 ms 100.0%
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... 11 ms 3.2%
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... 20 ms 5.9%
layouts/application 40 ms 11.7%