Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 10:00 AM
Duration
229.51 ms
Status
204
Response Size
59 KB
Error
No

Performance Breakdown

Database
12.2% (10 queries)
View Rendering
1.9%
Application Logic
85.9%
Other Operations
0.0%
Total Operations
19
Slowest Operation
229.51 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 400.8ms 801.5ms 1202.3ms 1603.1ms

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
home/index 7 ms 3.0%
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... 34 ms 14.8%
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 > ? 13 ms 5.7%
home#slow 230 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... 24 ms 10.5%
SELECT * FROM users WHERE id = ? 5 ms 2.2%
home#slow 230 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 5 ms 2.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 28 ms 12.2%
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... 29 ms 12.6%
home#slow 230 ms 100.0%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 27 ms 11.8%
home#slow 230 ms 100.0%
home#slow 230 ms 100.0%
SELECT name FROM users 19 ms 8.3%
home#slow 230 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 > ? 12 ms 5.2%
home/index 12 ms 5.2%
layouts/application 11 ms 4.8%