Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 5:55 AM
Duration
534.27 ms
Status
204
Response Size
180 KB
Error
No

Performance Breakdown

Database
1.4% (6 queries)
View Rendering
1.7%
Application Logic
96.8%
Other Operations
0.0%
Total Operations
26
Slowest Operation
534.27 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 2069.0ms 4138.0ms 6207.0ms 8276.0ms

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 35 ms 6.6%
home#slow 534 ms 100.0%
posts/show 20 ms 3.7%
home#slow 534 ms 100.0%
home/index 32 ms 6.0%
home#slow 534 ms 100.0%
SELECT posts.* FROM posts WHERE title LIKE ? OR content LIKE ? 8 ms 1.5%
layouts/application 19 ms 3.6%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 5 ms 0.9%
DELETE FROM comments WHERE created_at < ? 22 ms 4.1%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%
layouts/application 36 ms 6.7%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 22 ms 4.1%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 35 ms 6.6%
home#slow 534 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... 28 ms 5.2%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%
home#slow 534 ms 100.0%