Request Details

Route
/api_complex GET
Timestamp
Sep 10, 2026 9:50 AM
Duration
436.46 ms
Status
204
Response Size
56 KB
Error
No

Performance Breakdown

Database
3.6% (10 queries)
View Rendering
3.7%
Application Logic
92.7%
Other Operations
0.0%
Total Operations
25
Slowest Operation
436.46 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 941.9ms 1883.8ms 2825.7ms 3767.7ms

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 id, name, email FROM users WHERE id = ? 3 ms 0.7%
layouts/application 8 ms 1.8%
home#api_complex 436 ms 100.0%
home#api_complex 436 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... 3 ms 0.7%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 9 ms 2.1%
home/index 19 ms 4.4%
home/index 11 ms 2.5%
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... 18 ms 4.1%
SELECT * FROM posts WHERE created_at > ? 10 ms 2.3%
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... 13 ms 3.0%
home#api_complex 436 ms 100.0%
users/index 34 ms 7.8%
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... 21 ms 4.8%
home#api_complex 436 ms 100.0%
home#api_complex 436 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... 14 ms 3.2%
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... 24 ms 5.5%
layouts/application 32 ms 7.3%
home/index 31 ms 7.1%
posts/show 6 ms 1.4%
home#api_complex 436 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... 20 ms 4.6%
home#api_complex 436 ms 100.0%
home#api_complex 436 ms 100.0%