Request Details

Route
/slow GET
Timestamp
Sep 10, 2026 5:54 AM
Duration
273.94 ms
Status
204
Response Size
160 KB
Error
No

Performance Breakdown

Database
8.5% (11 queries)
View Rendering
7.8%
Application Logic
83.7%
Other Operations
0.0%
Total Operations
28
Slowest Operation
273.94 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 654.9ms 1309.8ms 1964.6ms 2619.5ms

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.*, 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... 27 ms 9.9%
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... 32 ms 11.7%
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... 7 ms 2.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 19 ms 6.9%
home/index 26 ms 9.5%
home/index 40 ms 14.6%
posts/show 15 ms 5.5%
home#slow 274 ms 100.0%
layouts/application 22 ms 8.0%
users/index 21 ms 7.7%
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 > ? 18 ms 6.6%
home#slow 274 ms 100.0%
home#slow 274 ms 100.0%
home#slow 274 ms 100.0%
home#slow 274 ms 100.0%
home/index 21 ms 7.7%
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... 27 ms 9.9%
SELECT name FROM users 16 ms 5.8%
home#slow 274 ms 100.0%
home#slow 274 ms 100.0%
layouts/application 38 ms 13.9%
home#slow 274 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... 23 ms 8.4%
users/index 14 ms 5.1%
home/index 8 ms 2.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 8 ms 2.9%
SELECT * FROM posts WHERE created_at > ? 26 ms 9.5%
SELECT * FROM users WHERE id = ? 20 ms 7.3%