convert to lower ascii 128?

[Ben Rubinstein]

Alex Tweedly wrote:
> Chipp Walters wrote:
>> Ben,
>> Thanks for the tests. Illuminating again. You are correct, I was actually
>> running my tests on shorter strings, but hundreds of them in sequence.
>>   
> So it might be useful for you to try Ben's fourth (i.e. array-based) 
> method, but do the set-up once using a script-local array.

But really - they're all so fast, you'd need to be processing megabytes of 
text on a continuous basis to care.  I'm embarassed I even went into it...

Ben