Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 10:21 PM
Duration
316.85 ms
Status
204
Response Size
160 KB
Error
No

Performance Breakdown

Database
4.5% (7 queries)
View Rendering
7.7%
Application Logic
87.8%
Other Operations
0.0%
Total Operations
22
Slowest Operation
316.85 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 541.5ms 1083.0ms 1624.6ms 2166.1ms

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
layouts/application 11 ms 3.5%
home#slow 317 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.9%
posts/show 20 ms 6.3%
home#slow 317 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 > ? 1 ms 0.3%
DELETE FROM posts WHERE id = ? 23 ms 7.3%
home#slow 317 ms 100.0%
layouts/application 8 ms 2.5%
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 5.4%
posts/show 31 ms 9.8%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 27 ms 8.5%
posts/show 32 ms 10.1%
users/index 12 ms 3.8%
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... 17 ms 5.4%
home#slow 317 ms 100.0%
users/index 15 ms 4.7%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 10 ms 3.2%
users/index 6 ms 1.9%
home#slow 317 ms 100.0%
posts/show 32 ms 10.1%
home#slow 317 ms 100.0%