Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 4:59 AM
Duration
503.36 ms
Status
204
Response Size
130 KB
Error
No

Performance Breakdown

Database
3.1% (10 queries)
View Rendering
4.7%
Application Logic
92.3%
Other Operations
0.0%
Total Operations
30
Slowest Operation
503.36 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 1227.6ms 2455.1ms 3682.7ms 4910.2ms

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
layouts/application 37 ms 7.4%
home#slow 503 ms 100.0%
home/index 27 ms 5.4%
home#slow 503 ms 100.0%
users/index 14 ms 2.8%
layouts/application 17 ms 3.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 3.0%
posts/show 10 ms 2.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 18 ms 3.6%
users/index 7 ms 1.4%
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 > ? 5 ms 1.0%
home#slow 503 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 7 ms 1.4%
posts/show 19 ms 3.8%
home#slow 503 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 5 ms 1.0%
home#slow 503 ms 100.0%
home#slow 503 ms 100.0%
home#slow 503 ms 100.0%
home/index 6 ms 1.2%
home#slow 503 ms 100.0%
home#slow 503 ms 100.0%
users/index 32 ms 6.4%
posts/show 40 ms 7.9%
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 > ? 29 ms 5.8%
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... 17 ms 3.4%
posts/show 20 ms 4.0%
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... 12 ms 2.4%
SELECT * FROM posts WHERE created_at > ? 10 ms 2.0%
SELECT * FROM posts WHERE created_at > ? 33 ms 6.6%