Request Details

Route
/api_complex GET
Timestamp
Sep 10, 2026 6:02 AM
Duration
172.99 ms
Status
201
Response Size
47 KB
Error
No

Performance Breakdown

Database
12.8% (9 queries)
View Rendering
15.2%
Application Logic
72.0%
Other Operations
0.0%
Total Operations
20
Slowest Operation
172.99 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 300.2ms 600.5ms 900.7ms 1200.9ms

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
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... 12 ms 6.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 4.0%
users/index 24 ms 13.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 15.6%
SELECT * FROM users WHERE id = ? 22 ms 12.7%
home#api_complex 173 ms 100.0%
home#api_complex 173 ms 100.0%
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 > ? 32 ms 18.5%
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... 13 ms 7.5%
home#api_complex 173 ms 100.0%
posts/show 26 ms 15.0%
users/index 38 ms 22.0%
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... 2 ms 1.2%
home/index 39 ms 22.5%
home/index 32 ms 18.5%
home#api_complex 173 ms 100.0%
home#api_complex 173 ms 100.0%
SELECT * FROM users WHERE id = ? 10 ms 5.8%
posts/show 23 ms 13.3%
SELECT name FROM users 29 ms 16.8%