This AWS Squid proxy caching server has been optimised for speed and high performance.

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. Squid has extensive access controls and makes a great server accelerator.

Squid Proxy Features
Set ACL for which networks have access to internet
Block/Allow access to certain websites
Block/Allow Content Based on MIME Types (e.g image, text, mpeg)
Set time in which users can access the internet at certain times in the day
Cache frequently accessed websites, cache files/media
Hide users internal IP Addresses
Load balance with other Squid proxies
Clustering
Traffic Interception with WCCP
Set authentication to get users to Authenticate (LDAP, Active Directory,RADIUS, POP3, DB, etc)
Allow/Block IM (Instant Messaging)
Block coin-mining scripts from using CPU/memory on users browsers. A new modern trend.
Adaptation protocol (C-ICAP / eCAP)
Caching Dynamic Content
Fully Transparent Interception with Squid-2, TPROXYv2 and WCCP
Configuring multiple interception ports using WCCPv2
WCCP2 and NAT on a private internal network
PHP Redirectors
SMP Carp Cluster
Torrent filtering
Webwasher integration - prevent downloading of virus-infected files or to filter out adult content