McAfee’s AntiMalware product can be a real resource hog for some people. Fortunately there’s a way to simply disable it via the command line. It can then be easily re-enabled the same way.
I made an alias in my profile to take care of that:
alias kill-mcafee='sudo /usr/local/McAfee/AntiMalware/VSControl stopoas'
Re-enabling it is just as easy:
alias unkill-mcafee='sudo /usr/local/McAfee/AntiMalware/VSControl startoas'