If you anticipate anything more than a handful of users subscribing to your channel, you should definitely consider setting up caching for your channel's pages.

Caching can significantly reduce the time it takes your readers to download your channel when they synchronize. The higher the volume of channel traffic—number of subscribers times size of channel—the greater the reduction in download time that caching can potentially provide.

If you are not sure that caching is worth the trouble, be sure to read Introduction to caching. Substitute your own projections for the numbers of downloads you expect on your channel. Unless you expect a very small number of subscribers, you will probably conclude that caching is worth the trouble.