Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 12:05 PM
Duration
266.09 ms
Status
201
Response Size
86 KB
Error
No

Performance Breakdown

Database
4.0% (8 queries)
View Rendering
4.4%
Application Logic
91.5%
Other Operations
0.0%
Total Operations
27
Slowest Operation
266.09 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 799.5ms 1599.0ms 2398.5ms 3198.0ms

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
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 7.5%
layouts/application 10 ms 3.8%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 7.9%
home#slow 266 ms 100.0%
home#slow 266 ms 100.0%
home#slow 266 ms 100.0%
home#slow 266 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... 17 ms 6.4%
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... 3 ms 1.1%
home#slow 266 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 > ? 29 ms 10.9%
posts/show 15 ms 5.6%
home#slow 266 ms 100.0%
home#slow 266 ms 100.0%
SELECT id, name FROM users WHERE email = ? 21 ms 7.9%
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... 11 ms 4.1%
posts/show 34 ms 12.8%
home/index 38 ms 14.3%
SELECT * FROM users WHERE id = ? 7 ms 2.6%
home/index 16 ms 6.0%
home#slow 266 ms 100.0%
home#slow 266 ms 100.0%
home/index 15 ms 5.6%
home#slow 266 ms 100.0%
users/index 6 ms 2.3%
layouts/application 8 ms 3.0%
home#slow 266 ms 100.0%