Request Details

Route
/slow GET
Timestamp
Sep 15, 2026 1:07 PM
Duration
308.98 ms
Status
200
Response Size
72 KB
Error
No

Performance Breakdown

Database
4.1% (9 queries)
View Rendering
7.7%
Application Logic
88.2%
Other Operations
0.0%
Total Operations
24
Slowest Operation
308.98 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 700.7ms 1401.4ms 2102.1ms 2802.9ms

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
layouts/application 32 ms 10.4%
home#slow 309 ms 100.0%
users/index 37 ms 12.0%
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 > ? 9 ms 2.9%
home#slow 309 ms 100.0%
SELECT id, name, email FROM users WHERE id = ? 13 ms 4.2%
users/index 23 ms 7.4%
home#slow 309 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 1 ms 0.3%
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... 32 ms 10.4%
users/index 39 ms 12.6%
home#slow 309 ms 100.0%
home#slow 309 ms 100.0%
UPDATE posts SET view_count = view_count + ? WHERE published = ? 17 ms 5.5%
home/index 24 ms 7.8%
SELECT * FROM users WHERE id = ? 24 ms 7.8%
home#slow 309 ms 100.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 1 ms 0.3%
home#slow 309 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 1 ms 0.3%
home#slow 309 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 16 ms 5.2%
home/index 30 ms 9.7%
users/index 32 ms 10.4%