Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 2:26 PM
Duration
176.72 ms
Status
204
Response Size
120 KB
Error
No

Performance Breakdown

Database
6.6% (7 queries)
View Rendering
7.8%
Application Logic
85.6%
Other Operations
0.0%
Total Operations
28
Slowest Operation
176.72 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 567.7ms 1135.5ms 1703.2ms 2271.0ms

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 10 ms 5.7%
home#slow 177 ms 100.0%
users/index 7 ms 4.0%
home#slow 177 ms 100.0%
home#slow 177 ms 100.0%
home#slow 177 ms 100.0%
home#slow 177 ms 100.0%
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... 28 ms 15.8%
home#slow 177 ms 100.0%
home#slow 177 ms 100.0%
users/index 36 ms 20.4%
home/index 33 ms 18.7%
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... 34 ms 19.2%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 2 ms 1.1%
users/index 7 ms 4.0%
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... 35 ms 19.8%
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 > ? 17 ms 9.6%
users/index 20 ms 11.3%
home#slow 177 ms 100.0%
users/index 17 ms 9.6%
home#slow 177 ms 100.0%
home#slow 177 ms 100.0%
home/index 11 ms 6.2%
posts/show 25 ms 14.1%
home/index 11 ms 6.2%
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 > ? 17 ms 9.6%
home#slow 177 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... 17 ms 9.6%