Request Details

Route
/slow GET
Timestamp
Sep 22, 2026 12:58 PM
Duration
429.9 ms
Status
200
Response Size
90 KB
Error
No

Performance Breakdown

Database
3.7% (8 queries)
View Rendering
6.9%
Application Logic
89.4%
Other Operations
0.0%
Total Operations
29
Slowest Operation
429.9 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 1202.5ms 2405.0ms 3607.5ms 4810.0ms

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
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 5.1%
home#slow 430 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 > ? 34 ms 7.9%
posts/show 31 ms 7.2%
layouts/application 38 ms 8.8%
users/index 36 ms 8.4%
home#slow 430 ms 100.0%
home/index 31 ms 7.2%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 8 ms 1.9%
DELETE FROM posts WHERE id = ? 30 ms 7.0%
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... 11 ms 2.6%
home#slow 430 ms 100.0%
layouts/application 40 ms 9.3%
layouts/application 29 ms 6.7%
home#slow 430 ms 100.0%
users/index 37 ms 8.6%
home/index 11 ms 2.6%
home#slow 430 ms 100.0%
home#slow 430 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 25 ms 5.8%
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... 24 ms 5.6%
home/index 21 ms 4.9%
home#slow 430 ms 100.0%
home#slow 430 ms 100.0%
layouts/application 34 ms 7.9%
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... 23 ms 5.4%
home#slow 430 ms 100.0%
home#slow 430 ms 100.0%
layouts/application 26 ms 6.0%