Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 4:06 PM
Duration
204.66 ms
Status
201
Response Size
78 KB
Error
No

Performance Breakdown

Database
5.7% (7 queries)
View Rendering
4.8%
Application Logic
89.5%
Other Operations
0.0%
Total Operations
23
Slowest Operation
204.66 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 571.9ms 1143.8ms 1715.7ms 2287.6ms

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 205 ms 100.0%
home#slow 205 ms 100.0%
home#slow 205 ms 100.0%
SELECT * FROM (SELECT users.id, users.name, users.email, COUNT(posts.id) as post_count FROM users LEFT JOIN posts ON users.id = posts.user_id WHERE users.active = ? GROUP BY users.id) as user_posts JOIN (SELECT user_id, COUNT(*) as comment_count FROM c... 12 ms 5.9%
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 > ? 19 ms 9.3%
home#slow 205 ms 100.0%
home#slow 205 ms 100.0%
home#slow 205 ms 100.0%
home#slow 205 ms 100.0%
home#slow 205 ms 100.0%
home/index 22 ms 10.7%
home/index 23 ms 11.2%
SELECT * FROM posts WHERE created_at > ? 14 ms 6.8%
layouts/application 36 ms 17.6%
home#slow 205 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... 35 ms 17.1%
posts/show 5 ms 2.4%
home/index 6 ms 2.9%
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... 14 ms 6.8%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 7.3%
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 > ? 22 ms 10.7%
home#slow 205 ms 100.0%
home/index 18 ms 8.8%