By placing entries into your Hosts file, addresses can be resolved quickly without calls to your DNS server, speeding up the connection to sites you visit often. This is what the Hosts file was originally designed for. Hostess keeps a list of all your hosts in a database file that is indexed to eliminate duplicates. You can also assign hosts to groups, making it easy to place the most often accessed hosts near the top of the Hosts file to improve performance. Its primary functions are intelligent caching using SonicCache technology and pre-loading pages based on user defined settings using SonicFetch.
All browsers use a storage folder called a cache.
NetSonic introduces a special type of cache to your system that allows for rapid display of previously visited sites without the delays you normally experience with a browser running alone. In addition to its caching ability, NetSonic allows for pre-loading of content from previously visited pages or pages you haven't visited yet, depending on how you configure NetSonic's SonicFetch feature. Pre-loaded pages will be displayed instantly from the NetSonic cache. Acceleration via 5 techniques including Prefetching Pages, Ad Blocking, and Agressive Connections. Normally a browser will have to go through DNS to find the IP number for a web resource, and this takes time.