Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 1:07 PM
Duration
313.19 ms
Status
201
Response Size
170 KB
Error
No

Performance Breakdown

Database
6.7% (13 queries)
View Rendering
2.7%
Application Logic
90.6%
Other Operations
0.0%
Total Operations
26
Slowest Operation
313.19 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 864.0ms 1727.9ms 2591.9ms 3455.9ms

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 * FROM posts WHERE created_at > ? 26 ms 8.3%
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... 18 ms 5.7%
users/index 19 ms 6.1%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 2 ms 0.6%
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 3.8%
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... 11 ms 3.5%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.6%
home#slow 313 ms 100.0%
home#slow 313 ms 100.0%
home#slow 313 ms 100.0%
SELECT id, name FROM users WHERE email = ? 29 ms 9.3%
layouts/application 35 ms 11.2%
home#slow 313 ms 100.0%
home#slow 313 ms 100.0%
home#slow 313 ms 100.0%
home#slow 313 ms 100.0%
home/index 38 ms 12.1%
DELETE FROM comments WHERE created_at < ? 20 ms 6.4%
SELECT * FROM users WHERE id = ? 19 ms 6.1%
home#slow 313 ms 100.0%
SELECT COUNT(*) FROM comments WHERE post_id = ? 35 ms 11.2%
home#slow 313 ms 100.0%
home#slow 313 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 16 ms 5.1%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 18 ms 5.7%
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 7.7%