Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 7:33 PM
Duration
196.59 ms
Status
201
Response Size
91 KB
Error
No

Performance Breakdown

Database
7.5% (9 queries)
View Rendering
12.0%
Application Logic
80.4%
Other Operations
0.0%
Total Operations
23
Slowest Operation
196.59 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 427.8ms 855.6ms 1283.3ms 1711.1ms

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 34 ms 17.3%
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... 8 ms 4.1%
layouts/application 5 ms 2.5%
home/index 30 ms 15.3%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 7.6%
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... 18 ms 9.2%
home#slow 197 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 5 ms 2.5%
home#slow 197 ms 100.0%
users/index 33 ms 16.8%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 16 ms 8.1%
users/index 28 ms 14.2%
home#slow 197 ms 100.0%
home#slow 197 ms 100.0%
posts/show 40 ms 20.3%
home#slow 197 ms 100.0%
home#slow 197 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... 23 ms 11.7%
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... 21 ms 10.7%
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... 2 ms 1.0%
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... 21 ms 10.7%
home#slow 197 ms 100.0%
users/index 36 ms 18.3%