Request Details

Route
/slow GET
Timestamp
Sep 14, 2026 8:22 AM
Duration
570.95 ms
Status
201
Response Size
170 KB
Error
No

Performance Breakdown

Database
2.9% (10 queries)
View Rendering
3.2%
Application Logic
93.9%
Other Operations
0.0%
Total Operations
30
Slowest Operation
570.95 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 1520.9ms 3041.8ms 4562.7ms 6083.5ms

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#slow 571 ms 100.0%
home#slow 571 ms 100.0%
layouts/application 14 ms 2.5%
users/index 19 ms 3.3%
SELECT * FROM users WHERE id = ? 22 ms 3.9%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 21 ms 3.7%
home/index 8 ms 1.4%
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... 2 ms 0.4%
home#slow 571 ms 100.0%
SELECT name FROM users 32 ms 5.6%
home#slow 571 ms 100.0%
users/index 31 ms 5.4%
home#slow 571 ms 100.0%
home#slow 571 ms 100.0%
home#slow 571 ms 100.0%
layouts/application 18 ms 3.2%
home#slow 571 ms 100.0%
home#slow 571 ms 100.0%
users/index 10 ms 1.8%
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 1.8%
home#slow 571 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 5.8%
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... 19 ms 3.3%
posts/show 8 ms 1.4%
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... 8 ms 1.4%
home/index 12 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... 15 ms 2.6%
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... 17 ms 3.0%
home/index 38 ms 6.7%
users/index 37 ms 6.5%