Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 9:42 PM
Duration
1264.68 ms
Status
204
Response Size
160 KB
Error
No

Performance Breakdown

Database
3.5% (12 queries)
View Rendering
1.5%
Application Logic
95.1%
Other Operations
0.0%
Total Operations
25
Slowest Operation
1264.68 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 1995.8ms 3991.5ms 5987.3ms 7983.1ms

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 20 ms 1.6%
home#slow 1265 ms 100.0%
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... 13 ms 1.0%
home#slow 1265 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 34 ms 2.7%
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 > ? 26 ms 2.1%
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... 26 ms 2.1%
home#slow 1265 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 17 ms 1.3%
home#slow 1265 ms 100.0%
layouts/application 15 ms 1.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 26 ms 2.1%
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... 34 ms 2.7%
layouts/application 16 ms 1.3%
users/index 9 ms 0.7%
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... 31 ms 2.5%
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... 16 ms 1.3%
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... 24 ms 1.9%
home#slow 1265 ms 100.0%
SELECT * FROM users WHERE id = ? 22 ms 1.7%
posts/show 5 ms 0.4%
posts/show 19 ms 1.5%
users/index 35 ms 2.8%
home#slow 1265 ms 100.0%
SELECT * FROM users WHERE id = ? 7 ms 0.6%