Request Details

Route
/slow GET
Timestamp
Sep 18, 2026 1:39 PM
Duration
296.71 ms
Status
201
Response Size
59 KB
Error
No

Performance Breakdown

Database
2.7% (6 queries)
View Rendering
7.1%
Application Logic
90.2%
Other Operations
0.0%
Total Operations
20
Slowest Operation
296.71 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 575.8ms 1151.5ms 1727.3ms 2303.0ms

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 name FROM users 12 ms 4.0%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 2 ms 0.7%
home#slow 297 ms 100.0%
home#slow 297 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... 18 ms 6.1%
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 3.0%
users/index 19 ms 6.4%
home/index 35 ms 11.8%
home/index 15 ms 5.1%
posts/show 21 ms 7.1%
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... 14 ms 4.7%
home#slow 297 ms 100.0%
home#slow 297 ms 100.0%
home#slow 297 ms 100.0%
posts/show 24 ms 8.1%
home#slow 297 ms 100.0%
home/index 27 ms 9.1%
layouts/application 22 ms 7.4%
home#slow 297 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 > ? 8 ms 2.7%