Request Details

Route
/slow GET
Timestamp
Sep 21, 2026 10:15 PM
Duration
237.29 ms
Status
201
Response Size
180 KB
Error
No

Performance Breakdown

Database
12.1% (8 queries)
View Rendering
13.6%
Application Logic
74.3%
Other Operations
0.0%
Total Operations
16
Slowest Operation
237.29 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 239.5ms 478.9ms 718.4ms 957.9ms

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
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 16 ms 6.7%
home#slow 237 ms 100.0%
home#slow 237 ms 100.0%
layouts/application 31 ms 13.1%
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 > ? 8 ms 3.4%
posts/show 14 ms 5.9%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 1 ms 0.4%
home/index 27 ms 11.4%
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... 11 ms 4.6%
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... 25 ms 10.5%
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... 22 ms 9.3%
posts/show 28 ms 11.8%
users/index 30 ms 12.6%
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 > ? 32 ms 13.5%
home#slow 237 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 1 ms 0.4%