Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 1:21 PM
Duration
326.79 ms
Status
204
Response Size
100 KB
Error
No

Performance Breakdown

Database
7.6% (12 queries)
View Rendering
9.0%
Application Logic
83.4%
Other Operations
0.0%
Total Operations
29
Slowest Operation
326.79 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 685.4ms 1370.8ms 2056.2ms 2741.6ms

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 (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... 29 ms 8.9%
home#slow 327 ms 100.0%
home#slow 327 ms 100.0%
SELECT name FROM users 24 ms 7.3%
home#slow 327 ms 100.0%
home/index 35 ms 10.7%
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 > ? 11 ms 3.4%
home#slow 327 ms 100.0%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 29 ms 8.9%
posts/show 18 ms 5.5%
home/index 36 ms 11.0%
posts/show 7 ms 2.1%
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... 32 ms 9.8%
home#slow 327 ms 100.0%
home#slow 327 ms 100.0%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 5 ms 1.5%
SELECT * FROM posts WHERE created_at > ? 3 ms 0.9%
home#slow 327 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 3 ms 0.9%
home/index 13 ms 4.0%
layouts/application 30 ms 9.2%
posts/show 34 ms 10.4%
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 > ? 2 ms 0.6%
users/index 20 ms 6.1%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 9.2%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 23 ms 7.0%
users/index 19 ms 5.8%
posts/show 34 ms 10.4%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 17 ms 5.2%