Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 7:33 AM
Duration
274.68 ms
Status
204
Response Size
140 KB
Error
No

Performance Breakdown

Database
5.6% (6 queries)
View Rendering
2.5%
Application Logic
91.8%
Other Operations
0.0%
Total Operations
18
Slowest Operation
274.68 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 598.1ms 1196.2ms 1794.3ms 2392.5ms

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#slow 275 ms 100.0%
posts/show 12 ms 4.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 6 ms 2.2%
SELECT id, name, email FROM users WHERE id = ? 11 ms 4.0%
home#slow 275 ms 100.0%
home#slow 275 ms 100.0%
home#slow 275 ms 100.0%
home#slow 275 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... 34 ms 12.4%
home#slow 275 ms 100.0%
posts/show 23 ms 8.4%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 6.6%
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 > ? 35 ms 12.7%
home#slow 275 ms 100.0%
users/index 8 ms 2.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 10.9%
posts/show 18 ms 6.6%
home#slow 275 ms 100.0%