Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 2:07 AM
Duration
435.81 ms
Status
204
Response Size
170 KB
Error
No

Performance Breakdown

Database
6.1% (12 queries)
View Rendering
5.6%
Application Logic
88.4%
Other Operations
0.0%
Total Operations
26
Slowest Operation
435.81 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 863.2ms 1726.3ms 2589.5ms 3452.7ms

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 posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 7 ms 1.6%
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 > ? 24 ms 5.5%
layouts/application 37 ms 8.5%
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... 27 ms 6.2%
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... 10 ms 2.3%
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... 22 ms 5.0%
layouts/application 34 ms 7.8%
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 > ? 10 ms 2.3%
home/index 9 ms 2.1%
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 8.0%
users/index 25 ms 5.7%
home#slow 436 ms 100.0%
home/index 30 ms 6.9%
home#slow 436 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 24 ms 5.5%
home#slow 436 ms 100.0%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 25 ms 5.7%
users/index 37 ms 8.5%
home#slow 436 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 1.6%
home#slow 436 ms 100.0%
home#slow 436 ms 100.0%
SELECT * FROM users WHERE id = ? 8 ms 1.8%
SELECT * FROM users WHERE id = ? 10 ms 2.3%
home#slow 436 ms 100.0%
posts/show 21 ms 4.8%