Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 11:20 PM
Duration
288.98 ms
Status
204
Response Size
200 KB
Error
No

Performance Breakdown

Database
11.8% (14 queries)
View Rendering
8.5%
Application Logic
79.6%
Other Operations
0.0%
Total Operations
29
Slowest Operation
288.98 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 544.5ms 1088.9ms 1633.4ms 2177.9ms

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 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 5.5%
users/index 31 ms 10.7%
posts/show 18 ms 6.2%
home#slow 289 ms 100.0%
SELECT users.*, posts.*, comments.*, COUNT(DISTINCT posts.id) as post_count, COUNT(DISTINCT comments.id) as comment_count, AVG(posts.view_count) as avg_views, MAX(comments.created_at) as latest_comment FROM users LEFT JOIN posts ON users.id = posts.use... 26 ms 9.0%
SELECT * FROM users WHERE id = ? 22 ms 7.6%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 3 ms 1.0%
DELETE FROM posts WHERE id = ? 34 ms 11.8%
layouts/application 15 ms 5.2%
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... 21 ms 7.3%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 33 ms 11.4%
home#slow 289 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 21 ms 7.3%
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... 19 ms 6.6%
layouts/application 17 ms 5.9%
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 5.5%
posts/show 6 ms 2.1%
SELECT id, name FROM users WHERE email = ? 5 ms 1.7%
home#slow 289 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... 4 ms 1.4%
home/index 8 ms 2.8%
home#slow 289 ms 100.0%
home#slow 289 ms 100.0%
users/index 31 ms 10.7%
SELECT id, name FROM users WHERE email = ? 32 ms 11.1%
home#slow 289 ms 100.0%
SELECT name FROM users 6 ms 2.1%
posts/show 28 ms 9.7%
layouts/application 32 ms 11.1%