It looks like many people assume this to be so but haven't done the benchmarks. FDE is going to be a much smaller hit than say anti-virus software. Encryption routines have been highly optimized into the multi gigabytes per second range.
> FDE is going to be a much smaller hit than say anti-virus software.
But I don't run any anti-virus, this is even one of the good reasons why I stopped using windows aeons ago. I tried LUKS with AES a few years ago, and though the performance was good it comes with a really significant hit.
