Of possible interest: fast UTF8 validation

[Walter Bright]

On 5/16/2018 5:47 AM, Ethan Watson wrote:
> I re-implemented some common string functionality at Remedy using SSE 4.2 
> instructions. Pretty handy. Except we had to turn that code off for released 
> products since nowhere near enough people are running SSE 4.2 capable hardware.

It would be nice to get this technique put into std.algorithm!