Request Details

Route
/api_complex GET
Timestamp
Sep 23, 2026 9:48 PM
Duration
186.01 ms
Status
200
Response Size
33 KB
Error
No

Performance Breakdown

Database
6.9% (8 queries)
View Rendering
4.5%
Application Logic
88.6%
Other Operations
0.0%
Total Operations
21
Slowest Operation
186.01 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 525.0ms 1050.0ms 1575.1ms 2100.1ms

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 186 ms 100.0%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 25 ms 13.4%
home#api_complex 186 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... 29 ms 15.6%
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... 5 ms 2.7%
home#api_complex 186 ms 100.0%
home/index 35 ms 18.8%
home#api_complex 186 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 8 ms 4.3%
SELECT name FROM users 16 ms 8.6%
DELETE FROM posts WHERE id = ? 13 ms 7.0%
home#api_complex 186 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 32 ms 17.2%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 17 ms 9.1%
home#api_complex 186 ms 100.0%
home#api_complex 186 ms 100.0%
home/index 34 ms 18.3%
home#api_complex 186 ms 100.0%
home#api_complex 186 ms 100.0%
home#api_complex 186 ms 100.0%
home/index 26 ms 14.0%