Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 5:39 PM
Duration
612.56 ms
Status
204
Response Size
110 KB
Error
No

Performance Breakdown

Database
5.1% (10 queries)
View Rendering
3.0%
Application Logic
91.8%
Other Operations
0.0%
Total Operations
24
Slowest Operation
612.56 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 1000.6ms 2001.2ms 3001.8ms 4002.3ms

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 14 ms 2.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 2.9%
home#slow 613 ms 100.0%
posts/show 16 ms 2.6%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 26 ms 4.2%
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... 28 ms 4.6%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 31 ms 5.1%
posts/show 25 ms 4.1%
home#slow 613 ms 100.0%
layouts/application 16 ms 2.6%
home/index 9 ms 1.5%
home#slow 613 ms 100.0%
home#slow 613 ms 100.0%
users/index 11 ms 1.8%
home#slow 613 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... 6 ms 1.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 4.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.3%
layouts/application 7 ms 1.1%
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 4.6%
posts/show 23 ms 3.8%
layouts/application 15 ms 2.4%
home#slow 613 ms 100.0%
SELECT * FROM users WHERE id = ? 22 ms 3.6%