Request Details

Route
/api_complex GET
Timestamp
Sep 21, 2026 9:58 AM
Duration
190.41 ms
Status
204
Response Size
80 KB
Error
No

Performance Breakdown

Database
10.0% (9 queries)
View Rendering
8.0%
Application Logic
82.1%
Other Operations
0.0%
Total Operations
24
Slowest Operation
190.41 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 464.1ms 928.1ms 1392.2ms 1856.3ms

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.*, 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... 27 ms 14.2%
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... 4 ms 2.1%
users/index 7 ms 3.7%
home/index 31 ms 16.3%
home#api_complex 190 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... 32 ms 16.8%
home#api_complex 190 ms 100.0%
home#api_complex 190 ms 100.0%
home#api_complex 190 ms 100.0%
home#api_complex 190 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 23 ms 12.1%
home#api_complex 190 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 23 ms 12.1%
layouts/application 29 ms 15.2%
SELECT name FROM users 14 ms 7.4%
layouts/application 19 ms 10.0%
layouts/application 24 ms 12.6%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 17 ms 8.9%
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... 11 ms 5.8%
layouts/application 14 ms 7.4%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 34 ms 17.9%
home#api_complex 190 ms 100.0%
users/index 24 ms 12.6%
home#api_complex 190 ms 100.0%