Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 2:54 PM
Duration
473.11 ms
Status
200
Response Size
210 KB
Error
No

Performance Breakdown

Database
4.8% (13 queries)
View Rendering
4.9%
Application Logic
90.3%
Other Operations
0.0%
Total Operations
30
Slowest Operation
473.11 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 1048.0ms 2095.9ms 3143.9ms 4191.9ms

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 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... 16 ms 3.4%
home#slow 473 ms 100.0%
home#slow 473 ms 100.0%
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... 31 ms 6.6%
layouts/application 26 ms 5.5%
SELECT * FROM users WHERE id = ? 1 ms 0.2%
home#slow 473 ms 100.0%
home#slow 473 ms 100.0%
home/index 31 ms 6.6%
users/index 12 ms 2.5%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 27 ms 5.7%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 8 ms 1.7%
posts/show 14 ms 3.0%
users/index 25 ms 5.3%
home#slow 473 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 17 ms 3.6%
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... 8 ms 1.7%
posts/show 19 ms 4.0%
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... 1 ms 0.2%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 11 ms 2.3%
home#slow 473 ms 100.0%
home#slow 473 ms 100.0%
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... 33 ms 7.0%
home#slow 473 ms 100.0%
SELECT * FROM users WHERE id = ? 15 ms 3.2%
users/index 31 ms 6.6%
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 5.1%
posts/show 37 ms 7.8%
SELECT id, name, email FROM users WHERE id = ? 9 ms 1.9%
home/index 11 ms 2.3%