Request Details

Route
/api_complex GET
Timestamp
Sep 21, 2026 9:59 AM
Duration
192.34 ms
Status
200
Response Size
71 KB
Error
No

Performance Breakdown

Database
7.5% (8 queries)
View Rendering
13.6%
Application Logic
79.0%
Other Operations
0.0%
Total Operations
23
Slowest Operation
192.34 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 426.1ms 852.2ms 1278.3ms 1704.4ms

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
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 1.6%
layouts/application 32 ms 16.6%
home/index 15 ms 7.8%
layouts/application 30 ms 15.6%
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... 28 ms 14.6%
posts/show 16 ms 8.3%
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... 1 ms 0.5%
SELECT * FROM users WHERE id = ? 23 ms 12.0%
home#api_complex 192 ms 100.0%
home#api_complex 192 ms 100.0%
home#api_complex 192 ms 100.0%
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 13.5%
home#api_complex 192 ms 100.0%
home#api_complex 192 ms 100.0%
users/index 30 ms 15.6%
home#api_complex 192 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 34 ms 17.7%
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... 8 ms 4.2%
home/index 30 ms 15.6%
SELECT COUNT(*) FROM comments WHERE post_id = ? 4 ms 2.1%
layouts/application 40 ms 20.8%
posts/show 38 ms 19.8%
home#api_complex 192 ms 100.0%