Request Details

Route
/slow GET
Timestamp
Sep 13, 2026 10:27 PM
Duration
469.32 ms
Status
204
Response Size
130 KB
Error
No

Performance Breakdown

Database
5.5% (10 queries)
View Rendering
3.5%
Application Logic
91.1%
Other Operations
0.0%
Total Operations
19
Slowest Operation
469.32 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 644.1ms 1288.3ms 1932.4ms 2576.6ms

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
posts/show 7 ms 1.5%
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 > ? 25 ms 5.3%
home#slow 469 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... 2 ms 0.4%
layouts/application 32 ms 6.8%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 30 ms 6.4%
SELECT name FROM users 22 ms 4.7%
home#slow 469 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... 5 ms 1.1%
home#slow 469 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... 17 ms 3.6%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 18 ms 3.8%
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... 2 ms 0.4%
SELECT posts.title, posts.content, users.name FROM posts JOIN users ON posts.user_id = users.id WHERE posts.published = ? 4 ms 0.9%
home#slow 469 ms 100.0%
posts/show 20 ms 4.3%
home#slow 469 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... 16 ms 3.4%
layouts/application 30 ms 6.4%