Have you had experience working with the Memcached caching system?

Yes, I have experience working with Memcached. Memcached is a distributed in-memory caching system that significantly speeds up access to frequently requested data, reducing the load on the database.

Example of using Memcached in Python with the pymemcache library:

from pymemcache.client import base

client = base.Client(('localhost', 11211))

# Write a value to cache
client.set('key', 'value')

# Retrieve a value from cache
value = client.get('key')
print(value)  # b'value'

Memcached is often used for caching database query results, user sessions, and other data where high-speed access is important.