Request Details

Route
/api_complex GET
Timestamp
Sep 13, 2026 4:21 AM
Duration
216.67 ms
Status
503
Response Size
2.7 KB
Error
Yes

Performance Breakdown

Database
13.0% (11 queries)
View Rendering
4.9%
Application Logic
82.0%
Other Operations
0.0%
Total Operations
24
Slowest Operation
216.67 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 462.2ms 924.3ms 1386.5ms 1848.7ms

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 name FROM users 30 ms 13.8%
posts/show 21 ms 9.7%
SELECT * FROM users WHERE id = ? 30 ms 13.8%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 15 ms 6.9%
SELECT * FROM posts WHERE created_at > ? 2 ms 0.9%
SELECT name FROM users 17 ms 7.8%
home#api_complex 217 ms 100.0%
layouts/application 11 ms 5.1%
home#api_complex 217 ms 100.0%
SELECT name FROM users 21 ms 9.7%
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 16.2%
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... 11 ms 5.1%
home#api_complex 217 ms 100.0%
home/index 5 ms 2.3%
home#api_complex 217 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... 34 ms 15.7%
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... 16 ms 7.4%
posts/show 22 ms 10.2%
layouts/application 19 ms 8.8%
home#api_complex 217 ms 100.0%
home#api_complex 217 ms 100.0%
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 > ? 30 ms 13.8%
home#api_complex 217 ms 100.0%
layouts/application 13 ms 6.0%