Request Details

Route
/api_complex GET
Timestamp
Sep 17, 2026 4:31 AM
Duration
187.61 ms
Status
200
Response Size
26 KB
Error
No

Performance Breakdown

Database
14.6% (12 queries)
View Rendering
14.5%
Application Logic
70.9%
Other Operations
0.0%
Total Operations
25
Slowest Operation
187.61 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 330.8ms 661.5ms 992.3ms 1323.1ms

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
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 13 ms 6.9%
SELECT * FROM posts WHERE created_at > ? 2 ms 1.1%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 35 ms 18.7%
users/index 40 ms 21.3%
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... 25 ms 13.3%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 16 ms 8.5%
layouts/application 7 ms 3.7%
posts/show 21 ms 11.2%
home/index 40 ms 21.3%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 5 ms 2.7%
posts/show 11 ms 5.9%
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... 16 ms 8.5%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 4 ms 2.1%
layouts/application 12 ms 6.4%
home#api_complex 188 ms 100.0%
home#api_complex 188 ms 100.0%
home#api_complex 188 ms 100.0%
posts/show 40 ms 21.3%
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... 35 ms 18.7%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 12 ms 6.4%
DELETE FROM comments WHERE created_at < ? 17 ms 9.1%
home/index 21 ms 11.2%
home#api_complex 188 ms 100.0%
home#api_complex 188 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 13 ms 6.9%