Request Details

Route
/slow GET
Timestamp
Sep 23, 2026 3:15 AM
Duration
417.58 ms
Status
201
Response Size
150 KB
Error
No

Performance Breakdown

Database
4.0% (9 queries)
View Rendering
5.1%
Application Logic
90.9%
Other Operations
0.0%
Total Operations
29
Slowest Operation
417.58 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 1148.2ms 2296.4ms 3444.6ms 4592.8ms

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
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... 34 ms 8.1%
home#slow 418 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... 29 ms 6.9%
posts/show 21 ms 5.0%
users/index 14 ms 3.4%
home#slow 418 ms 100.0%
SELECT id, name FROM users WHERE email = ? 21 ms 5.0%
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... 26 ms 6.2%
posts/show 36 ms 8.6%
home#slow 418 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 22 ms 5.3%
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... 6 ms 1.4%
home#slow 418 ms 100.0%
home/index 38 ms 9.1%
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... 16 ms 3.8%
posts/show 22 ms 5.3%
posts/show 14 ms 3.4%
home#slow 418 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 5.0%
posts/show 12 ms 2.9%
home#slow 418 ms 100.0%
home/index 22 ms 5.3%
home/index 34 ms 8.1%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
home#slow 418 ms 100.0%
users/index 20 ms 4.8%
home#slow 418 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 9 ms 2.2%