Request Details

Route
/slow GET
Timestamp
Sep 23, 2026 3:15 AM
Duration
361.8 ms
Status
200
Response Size
70 KB
Error
No

Performance Breakdown

Database
5.8% (13 queries)
View Rendering
2.5%
Application Logic
91.7%
Other Operations
0.0%
Total Operations
27
Slowest Operation
361.8 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 986.5ms 1973.0ms 2959.5ms 3946.0ms

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
DELETE FROM posts WHERE id = ? 26 ms 7.2%
home#slow 362 ms 100.0%
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... 18 ms 5.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 6.6%
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... 16 ms 4.4%
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... 4 ms 1.1%
layouts/application 18 ms 5.0%
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... 7 ms 1.9%
home#slow 362 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 28 ms 7.7%
home/index 17 ms 4.7%
home#slow 362 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 9 ms 2.5%
home#slow 362 ms 100.0%
posts/show 25 ms 6.9%
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... 31 ms 8.6%
home/index 38 ms 10.5%
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... 13 ms 3.6%
SELECT * FROM posts WHERE created_at > ? 14 ms 3.9%
home#slow 362 ms 100.0%
SELECT name FROM users 31 ms 8.6%
home#slow 362 ms 100.0%
home#slow 362 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... 9 ms 2.5%
home#slow 362 ms 100.0%
home#slow 362 ms 100.0%
home#slow 362 ms 100.0%