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Cursor pagination is blazing fast, but it’s not a universal solution. Unlike traditional offset pagination, which skips a fixed number of records, cursor pagination uses a reference point (cursor) to fetch the next set of results efficiently. This cursor is typically a unique identifier or a combination of fields that define the sort order.
Performance tests reveal that cursor pagination can be 17x faster than offset pagination, making it ideal for real-time feeds and infinite scroll interfaces. However, if users mostly access the first few pages, offset pagination may suffice.
Want to learn more?
Here’s an implementation guide + performance analysis: https://lnkd.in/eDpvvAAQ
You Should Know:
Implementing Cursor Pagination in SQL
-- Using a cursor (e.g., last fetched ID)
SELECT FROM products
WHERE id > {last_cursor_id}
ORDER BY id ASC
LIMIT 10;
Cursor Pagination in Python (Django Example)
def get_paginated_data(last_cursor=None, limit=10):
queryset = Product.objects.all().order_by('id')
if last_cursor:
queryset = queryset.filter(id__gt=last_cursor)
return queryset[:limit]
Cursor Pagination in API (REST Example)
{
"next_cursor": "a1b2c3",
"data": [
{"id": "a1b2c3", "name": "Product 1"},
{"id": "d4e5f6", "name": "Product 2"}
]
}
Performance Benchmarking (Linux Command)
ab -n 1000 -c 100 "http://api.example.com/products?cursor=last_id"
Redis Cursor-Based Pagination
ZRANGEBYSCORE items {last_score} +inf LIMIT 0 10
What Undercode Say
Cursor pagination is a game-changer for high-traffic applications, reducing database load significantly. However, it requires a stable sort order and doesn’t support random page jumps. For static datasets, offset pagination remains simpler.
Key Commands & Tools:
- PostgreSQL Cursor Pagination:
SELECT FROM logs WHERE timestamp > {last_timestamp} ORDER BY timestamp LIMIT 20; - MongoDB Implementation:
db.collection.find({ _id: { $gt: lastCursor } }).limit(10); - Linux Performance Check:
time curl "http://api.example.com/data?cursor=xyz"
- Windows Equivalent (PowerShell):
Measure-Command { Invoke-RestMethod "http://api.example.com/data?cursor=xyz" }
For large-scale systems, cursor pagination is a must. Yet, always validate if your use case demands it.
Expected Output:
A highly optimized API response with minimal latency, leveraging cursor-based navigation for seamless data retrieval.
Reference:
References:
Reported By: Milan Jovanovic – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
