Request Details

Route
/api_complex GET
Timestamp
Sep 22, 2026 2:42 PM
Duration
152.55 ms
Status
200
Response Size
32 KB
Error
No

Performance Breakdown

Database
15.6% (7 queries)
View Rendering
13.5%
Application Logic
70.9%
Other Operations
0.0%
Total Operations
15
Slowest Operation
152.55 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 215.0ms 430.1ms 645.1ms 860.2ms

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
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... 13 ms 8.5%
home#api_complex 153 ms 100.0%
SELECT id, name FROM users WHERE email = ? 24 ms 15.7%
users/index 25 ms 16.4%
SELECT name FROM users 12 ms 7.9%
home/index 28 ms 18.4%
home#api_complex 153 ms 100.0%
home#api_complex 153 ms 100.0%
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... 35 ms 22.9%
home#api_complex 153 ms 100.0%
home/index 34 ms 22.3%
home/index 29 ms 19.0%
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... 8 ms 5.2%
SELECT COUNT(*) FROM comments WHERE post_id = ? 16 ms 10.5%
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... 26 ms 17.0%