Request Details

Route
/api_complex GET
Timestamp
Sep 10, 2026 1:34 AM
Duration
320.9 ms
Status
200
Response Size
70 KB
Error
No

Performance Breakdown

Database
6.8% (8 queries)
View Rendering
7.6%
Application Logic
85.7%
Other Operations
0.0%
Total Operations
21
Slowest Operation
320.9 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 561.9ms 1123.7ms 1685.6ms 2247.4ms

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
posts/show 34 ms 10.6%
SELECT name FROM users 20 ms 6.2%
home#api_complex 321 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... 18 ms 5.6%
home#api_complex 321 ms 100.0%
home#api_complex 321 ms 100.0%
layouts/application 12 ms 3.7%
home#api_complex 321 ms 100.0%
posts/show 20 ms 6.2%
posts/show 28 ms 8.7%
SELECT * FROM users WHERE id = ? 34 ms 10.6%
posts/show 11 ms 3.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 17 ms 5.3%
SELECT name FROM users 1 ms 0.3%
home#api_complex 321 ms 100.0%
home#api_complex 321 ms 100.0%
home/index 40 ms 12.5%
SELECT * FROM posts WHERE created_at > ? 29 ms 9.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 19 ms 5.9%
SELECT * FROM users WHERE id = ? 14 ms 4.4%
posts/show 25 ms 7.8%