Request Details

Route
/slow GET
Timestamp
Sep 11, 2026 2:16 PM
Duration
443.95 ms
Status
200
Response Size
170 KB
Error
No

Performance Breakdown

Database
3.3% (10 queries)
View Rendering
3.7%
Application Logic
93.0%
Other Operations
0.0%
Total Operations
30
Slowest Operation
443.95 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 1313.3ms 2626.7ms 3940.0ms 5253.4ms

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 444 ms 100.0%
users/index 13 ms 2.9%
SELECT * FROM posts WHERE user_id = ? ORDER BY created_at DESC LIMIT ? 20 ms 4.5%
home/index 8 ms 1.8%
home#slow 444 ms 100.0%
users/index 26 ms 5.9%
home#slow 444 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... 15 ms 3.4%
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 5.2%
SELECT users.* FROM users LEFT JOIN posts ON users.id = posts.user_id LEFT JOIN comments ON posts.id = comments.post_id WHERE users.active = ? AND posts.published = ? AND comments.approved = ? OR users.created_at > ? AND posts.created_at > ? AND commen... 25 ms 5.6%
home/index 30 ms 6.8%
INSERT INTO posts (user_id, title, content, published, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?) 30 ms 6.8%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 9 ms 2.0%
home#slow 444 ms 100.0%
SELECT * FROM posts WHERE created_at > ? 11 ms 2.5%
layouts/application 25 ms 5.6%
home/index 29 ms 6.5%
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... 1 ms 0.2%
DELETE FROM posts WHERE id = ? 26 ms 5.9%
layouts/application 32 ms 7.2%
home#slow 444 ms 100.0%
home#slow 444 ms 100.0%
home#slow 444 ms 100.0%
home#slow 444 ms 100.0%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 15 ms 3.4%
home#slow 444 ms 100.0%
home#slow 444 ms 100.0%
users/index 5 ms 1.1%
layouts/application 27 ms 6.1%
home#slow 444 ms 100.0%