Request Details

Route
/slow GET
Timestamp
Sep 16, 2026 3:28 AM
Duration
350.49 ms
Status
201
Response Size
90 KB
Error
No

Performance Breakdown

Database
7.0% (11 queries)
View Rendering
6.8%
Application Logic
86.3%
Other Operations
0.0%
Total Operations
26
Slowest Operation
350.49 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 710.9ms 1421.7ms 2132.6ms 2843.4ms

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
users/index 40 ms 11.4%
posts/show 27 ms 7.7%
home#slow 350 ms 100.0%
home#slow 350 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... 28 ms 8.0%
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... 5 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... 10 ms 2.9%
SELECT name FROM users 10 ms 2.9%
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 > ? 18 ms 5.1%
home#slow 350 ms 100.0%
posts/show 13 ms 3.7%
SELECT id, name FROM users WHERE email = ? 22 ms 6.3%
posts/show 23 ms 6.6%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 11 ms 3.1%
home#slow 350 ms 100.0%
users/index 18 ms 5.1%
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... 31 ms 8.8%
home#slow 350 ms 100.0%
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 > ? 4 ms 1.1%
users/index 30 ms 8.6%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 34 ms 9.7%
DELETE FROM posts WHERE id = ? 25 ms 7.1%
home/index 15 ms 4.3%
posts/show 26 ms 7.4%
home#slow 350 ms 100.0%
home#slow 350 ms 100.0%