Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 9:18 PM
Duration
334.24 ms
Status
204
Response Size
130 KB
Error
No

Performance Breakdown

Database
1.3% (5 queries)
View Rendering
5.7%
Application Logic
93.0%
Other Operations
0.0%
Total Operations
26
Slowest Operation
334.24 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 1078.5ms 2156.9ms 3235.4ms 4313.8ms

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
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
home/index 23 ms 6.9%
posts/show 23 ms 6.9%
home/index 17 ms 5.1%
home#slow 334 ms 100.0%
home#slow 334 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... 1 ms 0.3%
home#slow 334 ms 100.0%
home#slow 334 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... 17 ms 5.1%
users/index 32 ms 9.6%
home#slow 334 ms 100.0%
posts/show 39 ms 11.7%
home/index 25 ms 7.5%
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... 7 ms 2.1%
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 > ? 15 ms 4.5%
SELECT * FROM posts WHERE created_at > ? 15 ms 4.5%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
home#slow 334 ms 100.0%
posts/show 30 ms 9.0%
home#slow 334 ms 100.0%
users/index 35 ms 10.5%
users/index 24 ms 7.2%