Request Details

Route
/api_complex GET
Timestamp
Sep 20, 2026 10:08 AM
Duration
81.26 ms
Status
201
Response Size
42 KB
Error
No

Performance Breakdown

Database
13.3% (7 queries)
View Rendering
32.0%
Application Logic
54.7%
Other Operations
0.0%
Total Operations
24
Slowest Operation
81.26 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 222.9ms 445.8ms 668.7ms 891.6ms

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
layouts/application 22 ms 27.1%
home#api_complex 81 ms 100.0%
posts/show 22 ms 27.1%
home#api_complex 81 ms 100.0%
posts/show 35 ms 43.1%
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... 14 ms 17.2%
layouts/application 26 ms 32.0%
layouts/application 15 ms 18.5%
home#api_complex 81 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 3 ms 3.7%
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 > ? 20 ms 24.6%
layouts/application 37 ms 45.5%
home#api_complex 81 ms 100.0%
SELECT name FROM users 34 ms 41.8%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 20 ms 24.6%
posts/show 18 ms 22.2%
home/index 38 ms 46.8%
users/index 39 ms 48.0%
home/index 15 ms 18.5%
layouts/application 18 ms 22.2%
home#api_complex 81 ms 100.0%
home#api_complex 81 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... 20 ms 24.6%
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 9.8%