Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 3:23 PM
Duration
424.37 ms
Status
200
Response Size
95 KB
Error
No

Performance Breakdown

Database
4.6% (10 queries)
View Rendering
3.5%
Application Logic
91.9%
Other Operations
0.0%
Total Operations
26
Slowest Operation
424.37 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 1039.3ms 2078.7ms 3118.0ms 4157.4ms

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 424 ms 100.0%
users/index 5 ms 1.2%
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... 16 ms 3.8%
users/index 21 ms 4.9%
home#slow 424 ms 100.0%
home#slow 424 ms 100.0%
home#slow 424 ms 100.0%
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... 23 ms 5.4%
SELECT name FROM users 4 ms 0.9%
posts/show 24 ms 5.7%
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 > ? 22 ms 5.2%
home#slow 424 ms 100.0%
home#slow 424 ms 100.0%
home#slow 424 ms 100.0%
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... 17 ms 4.0%
SELECT name FROM users 7 ms 1.6%
home#slow 424 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 6.6%
users/index 34 ms 8.0%
home#slow 424 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 7.8%
SELECT name FROM users 26 ms 6.1%
home/index 23 ms 5.4%
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... 15 ms 3.5%
users/index 30 ms 7.1%
home/index 10 ms 2.4%