Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 8:22 AM
Duration
233.36 ms
Status
200
Response Size
92 KB
Error
No

Performance Breakdown

Database
7.0% (9 queries)
View Rendering
6.0%
Application Logic
86.9%
Other Operations
0.0%
Total Operations
25
Slowest Operation
233.36 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 604.1ms 1208.1ms 1812.2ms 2416.2ms

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 * FROM users WHERE id = ? 35 ms 15.0%
users/index 17 ms 7.3%
home#slow 233 ms 100.0%
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... 9 ms 3.9%
home#slow 233 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 22 ms 9.4%
SELECT * FROM posts WHERE created_at > ? 28 ms 12.0%
home#slow 233 ms 100.0%
home#slow 233 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 2.6%
users/index 37 ms 15.9%
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 8.6%
home#slow 233 ms 100.0%
home#slow 233 ms 100.0%
home#slow 233 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 31 ms 13.3%
users/index 21 ms 9.0%
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 > ? 3 ms 1.3%
posts/show 11 ms 4.7%
home/index 21 ms 9.0%
SELECT name FROM users 16 ms 6.9%
home#slow 233 ms 100.0%
posts/show 30 ms 12.9%
users/index 9 ms 3.9%
home#slow 233 ms 100.0%