Request Details

Route
/api_complex GET
Timestamp
Sep 09, 2026 12:37 PM
Duration
293.41 ms
Status
201
Response Size
27 KB
Error
No

Performance Breakdown

Database
4.2% (4 queries)
View Rendering
3.4%
Application Logic
92.4%
Other Operations
0.0%
Total Operations
15
Slowest Operation
293.41 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 555.7ms 1111.5ms 1667.2ms 2222.9ms

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#api_complex 293 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 35 ms 11.9%
home#api_complex 293 ms 100.0%
home/index 23 ms 7.8%
home#api_complex 293 ms 100.0%
home#api_complex 293 ms 100.0%
home/index 22 ms 7.5%
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 10.9%
home#api_complex 293 ms 100.0%
home#api_complex 293 ms 100.0%
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... 14 ms 4.8%
users/index 8 ms 2.7%
home#api_complex 293 ms 100.0%
DELETE FROM comments WHERE created_at < ? 12 ms 4.1%
posts/show 23 ms 7.8%