Request Details

Route
/api_complex GET
Timestamp
Sep 12, 2026 1:17 AM
Duration
199.07 ms
Status
200
Response Size
29 KB
Error
No

Performance Breakdown

Database
16.9% (6 queries)
View Rendering
1.9%
Application Logic
81.2%
Other Operations
0.0%
Total Operations
10
Slowest Operation
199.07 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 183.8ms 367.6ms 551.4ms 735.2ms

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 199 ms 100.0%
users/index 14 ms 7.0%
SELECT * FROM posts WHERE created_at > ? 29 ms 14.6%
SELECT COUNT(*) FROM comments WHERE post_id = ? 10 ms 5.0%
DELETE FROM comments WHERE created_at < ? 16 ms 8.0%
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... 29 ms 14.6%
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 > ? 8 ms 4.0%
home#api_complex 199 ms 100.0%
home#api_complex 199 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... 32 ms 16.1%