Request Details

Route
/slow GET
Timestamp
Sep 19, 2026 1:54 PM
Duration
327.4 ms
Status
200
Response Size
56 KB
Error
No

Performance Breakdown

Database
3.9% (8 queries)
View Rendering
3.3%
Application Logic
92.7%
Other Operations
0.0%
Total Operations
25
Slowest Operation
327.4 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 882.8ms 1765.5ms 2648.3ms 3531.0ms

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 id, name, email FROM users WHERE id = ? 11 ms 3.4%
home/index 19 ms 5.8%
posts/show 16 ms 4.9%
home#slow 327 ms 100.0%
layouts/application 29 ms 8.9%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 3 ms 0.9%
home#slow 327 ms 100.0%
home#slow 327 ms 100.0%
users/index 10 ms 3.1%
home#slow 327 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... 32 ms 9.8%
SELECT name FROM users 18 ms 5.5%
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 > ? 26 ms 7.9%
home#slow 327 ms 100.0%
home#slow 327 ms 100.0%
users/index 11 ms 3.4%
home#slow 327 ms 100.0%
home/index 19 ms 5.8%
SELECT COUNT(*) FROM comments WHERE post_id = ? 3 ms 0.9%
home#slow 327 ms 100.0%
home#slow 327 ms 100.0%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 17 ms 5.2%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 29 ms 8.9%
home#slow 327 ms 100.0%
layouts/application 14 ms 4.3%