Request Details

Route
/slow GET
Timestamp
Sep 09, 2026 8:36 PM
Duration
340.31 ms
Status
201
Response Size
170 KB
Error
No

Performance Breakdown

Database
6.2% (10 queries)
View Rendering
8.9%
Application Logic
84.9%
Other Operations
0.0%
Total Operations
27
Slowest Operation
340.31 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 601.0ms 1201.9ms 1802.9ms 2403.9ms

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
users/index 14 ms 4.1%
home/index 19 ms 5.6%
SELECT * FROM comments WHERE post_id = ? ORDER BY created_at DESC LIMIT ? 14 ms 4.1%
posts/show 6 ms 1.8%
posts/show 35 ms 10.3%
users/index 33 ms 9.7%
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... 12 ms 3.5%
home#slow 340 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... 19 ms 5.6%
home#slow 340 ms 100.0%
home/index 17 ms 5.0%
layouts/application 26 ms 7.6%
SELECT COUNT(*) FROM comments WHERE post_id = ? 18 ms 5.3%
home/index 28 ms 8.2%
SELECT * FROM posts WHERE title LIKE ? AND content LIKE ? AND LOWER(title) LIKE ? AND UPPER(content) LIKE ? 8 ms 2.4%
users/index 9 ms 2.6%
home#slow 340 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... 24 ms 7.1%
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... 21 ms 6.2%
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... 1 ms 0.3%
home#slow 340 ms 100.0%
home#slow 340 ms 100.0%
posts/show 14 ms 4.1%
UPDATE posts SET title = ?, content = ?, updated_at = ? WHERE id = ? 9 ms 2.6%
SELECT id, name, email FROM users WHERE id = ? 22 ms 6.5%
posts/show 13 ms 3.8%
home#slow 340 ms 100.0%