Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 6:28 PM
Duration
291.96 ms
Status
201
Response Size
46 KB
Error
No

Performance Breakdown

Database
4.6% (8 queries)
View Rendering
3.5%
Application Logic
91.9%
Other Operations
0.0%
Total Operations
24
Slowest Operation
291.96 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 714.9ms 1429.8ms 2144.8ms 2859.7ms

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
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 35 ms 12.0%
home#slow 292 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 5.1%
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... 12 ms 4.1%
users/index 12 ms 4.1%
home/index 19 ms 6.5%
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... 21 ms 7.2%
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... 22 ms 7.5%
home#slow 292 ms 100.0%
home#slow 292 ms 100.0%
users/index 19 ms 6.5%
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... 1 ms 0.3%
home#slow 292 ms 100.0%
SELECT * FROM users WHERE id = ? 6 ms 2.1%
posts/show 5 ms 1.7%
home#slow 292 ms 100.0%
home#slow 292 ms 100.0%
home/index 8 ms 2.7%
home#slow 292 ms 100.0%
home#slow 292 ms 100.0%
home/index 13 ms 4.5%
home#slow 292 ms 100.0%
SELECT name FROM users 19 ms 6.5%
home/index 25 ms 8.6%