Request Details

Route
/api_complex GET
Timestamp
Sep 18, 2026 1:00 AM
Duration
174.56 ms
Status
200
Response Size
21 KB
Error
No

Performance Breakdown

Database
12.5% (7 queries)
View Rendering
20.7%
Application Logic
66.8%
Other Operations
0.0%
Total Operations
21
Slowest Operation
174.56 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 261.3ms 522.6ms 783.9ms 1045.2ms

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
home#api_complex 175 ms 100.0%
layouts/application 17 ms 9.7%
users/index 11 ms 6.3%
home/index 28 ms 16.0%
home/index 40 ms 22.9%
home/index 35 ms 20.1%
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 > ? 28 ms 16.0%
home/index 15 ms 8.6%
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... 17 ms 9.7%
posts/show 5 ms 2.9%
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 2.3%
home/index 5 ms 2.9%
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... 15 ms 8.6%
posts/show 32 ms 18.3%
home#api_complex 175 ms 100.0%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 32 ms 18.3%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 1.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 32 ms 18.3%
home#api_complex 175 ms 100.0%
layouts/application 28 ms 16.0%
home#api_complex 175 ms 100.0%