Blocking them before they get to you isn't easy.
Why would I use Multisite vs Single Sites when I have 100 sites?
The other side of speed is understanding what your server can cache for you. Sandra Bullock not included.
The art of caching and catching content. Understanding what makes up static content is the first step to speed.
I finally set up nginx as a proxy for my apache box. This is not true nginx, and I can't run SPDY on it yet, or even SSL, but it sure does speed stuff up!
An experiment with CloudFlare as a cloud proxy service. I now understand it, and I can recommend it to certain people.
Protecting your website can come in many flavors. I've always learned towards doing as much on the server (vs in the 'app'), but the new trend of external services that speed your site up and protect you confuse me.
A lot of words in order to make a smaller, faster, leaner, meaner site. My experiment with going sans Caching Plugins begins.
ClamAV uses more resources than it's usefulness indicates.
While I want to say you'll never need caching, the truth is you probably will need it one day.