Request Details

Route
/slow GET
Timestamp
Sep 12, 2026 3:58 PM
Duration
458.47 ms
Status
204
Response Size
120 KB
Error
No

Performance Breakdown

Database
3.9% (10 queries)
View Rendering
3.9%
Application Logic
92.2%
Other Operations
0.0%
Total Operations
27
Slowest Operation
458.47 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 1118.8ms 2237.6ms 3356.4ms 4475.2ms

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
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... 1 ms 0.2%
home#slow 458 ms 100.0%
users/index 36 ms 7.9%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 28 ms 6.1%
home#slow 458 ms 100.0%
home#slow 458 ms 100.0%
home#slow 458 ms 100.0%
users/index 37 ms 8.1%
home/index 30 ms 6.5%
SELECT name FROM users 15 ms 3.3%
posts/show 7 ms 1.5%
users/index 24 ms 5.2%
layouts/application 9 ms 2.0%
home#slow 458 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 10 ms 2.2%
SELECT * FROM users WHERE id = ? 25 ms 5.5%
home#slow 458 ms 100.0%
users/index 19 ms 4.1%
home#slow 458 ms 100.0%
SELECT id, name FROM users WHERE email = ? 28 ms 6.1%
SELECT name FROM users 17 ms 3.7%
home#slow 458 ms 100.0%
layouts/application 12 ms 2.6%
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... 33 ms 7.2%
SELECT users.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, SUM(posts.view_count) as total_views, AVG(posts.view_count) as avg_views, MIN(posts.created_at) as first_post, MAX(posts.created_at) as latest_post FR... 15 ms 3.3%
home#slow 458 ms 100.0%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 3 ms 0.7%