Request Details

Route
/slow GET
Timestamp
Sep 17, 2026 4:19 AM
Duration
239.27 ms
Status
204
Response Size
83 KB
Error
No

Performance Breakdown

Database
4.6% (8 queries)
View Rendering
5.1%
Application Logic
90.3%
Other Operations
0.0%
Total Operations
23
Slowest Operation
239.27 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 596.1ms 1192.2ms 1788.3ms 2384.4ms

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 239 ms 100.0%
home#slow 239 ms 100.0%
home#slow 239 ms 100.0%
home/index 8 ms 3.3%
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... 6 ms 2.5%
users/index 7 ms 2.9%
SELECT name FROM users 1 ms 0.4%
home/index 24 ms 10.0%
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 > ? 22 ms 9.2%
users/index 20 ms 8.4%
home#slow 239 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 > ? 10 ms 4.2%
home/index 32 ms 13.4%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 10.4%
SELECT * FROM posts WHERE created_at > ? 14 ms 5.9%
home#slow 239 ms 100.0%
home#slow 239 ms 100.0%
SELECT * FROM users WHERE id = ? 5 ms 2.1%
home#slow 239 ms 100.0%
home/index 30 ms 12.5%
home#slow 239 ms 100.0%
home#slow 239 ms 100.0%
SELECT * FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id LEFT JOIN tags ON posts.id = tags.post_id LEFT JOIN categories ON posts.category_id = categories.id WHERE users.active = ? AND posts.publi... 27 ms 11.3%