Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 9:13 AM
Duration
300.08 ms
Status
201
Response Size
180 KB
Error
No

Performance Breakdown

Database
4.8% (8 queries)
View Rendering
7.4%
Application Logic
87.8%
Other Operations
0.0%
Total Operations
27
Slowest Operation
300.08 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 854.2ms 1708.4ms 2562.6ms 3416.8ms

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 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 > ? 18 ms 6.0%
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... 33 ms 11.0%
home#slow 300 ms 100.0%
home#slow 300 ms 100.0%
users/index 17 ms 5.7%
home#slow 300 ms 100.0%
home#slow 300 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 9 ms 3.0%
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... 28 ms 9.3%
home#slow 300 ms 100.0%
users/index 37 ms 12.3%
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... 30 ms 10.0%
posts/show 14 ms 4.7%
home#slow 300 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 > ? 6 ms 2.0%
users/index 38 ms 12.7%
home#slow 300 ms 100.0%
posts/show 27 ms 9.0%
home#slow 300 ms 100.0%
layouts/application 28 ms 9.3%
SELECT * FROM users WHERE id = ? 15 ms 5.0%
home#slow 300 ms 100.0%
users/index 21 ms 7.0%
SELECT * FROM posts WHERE created_at > ? 25 ms 8.3%
home#slow 300 ms 100.0%
home/index 37 ms 12.3%
layouts/application 33 ms 11.0%