Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 4:17 PM
Duration
194.41 ms
Status
201
Response Size
70 KB
Error
No

Performance Breakdown

Database
7.9% (6 queries)
View Rendering
4.6%
Application Logic
87.4%
Other Operations
0.0%
Total Operations
16
Slowest Operation
194.41 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 333.6ms 667.2ms 1000.8ms 1334.5ms

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 name FROM users 10 ms 5.1%
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... 2 ms 1.0%
posts/show 6 ms 3.1%
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... 35 ms 18.0%
layouts/application 12 ms 6.2%
home#api_complex 194 ms 100.0%
home#api_complex 194 ms 100.0%
layouts/application 18 ms 9.3%
layouts/application 26 ms 13.4%
home#api_complex 194 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 12.3%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 8 ms 4.1%
home#api_complex 194 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 > ? 27 ms 13.9%
home#api_complex 194 ms 100.0%
home#api_complex 194 ms 100.0%