Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 10:57 PM
Duration
280.5 ms
Status
204
Response Size
170 KB
Error
No

Performance Breakdown

Database
7.5% (9 queries)
View Rendering
3.2%
Application Logic
89.3%
Other Operations
0.0%
Total Operations
20
Slowest Operation
280.5 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 549.6ms 1099.3ms 1648.9ms 2198.5ms

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 281 ms 100.0%
home#slow 281 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... 18 ms 6.4%
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... 11 ms 3.9%
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... 8 ms 2.9%
home#slow 281 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... 33 ms 11.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 6 ms 2.1%
home#slow 281 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... 13 ms 4.6%
home/index 11 ms 3.9%
SELECT * FROM users WHERE id = ? 21 ms 7.5%
SELECT * FROM posts WHERE created_at > ? 22 ms 7.8%
layouts/application 5 ms 1.8%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 33 ms 11.8%
posts/show 35 ms 12.5%
home#slow 281 ms 100.0%
home#slow 281 ms 100.0%
posts/show 19 ms 6.8%
home#slow 281 ms 100.0%