To Walter, about char[] initialization by FF

[Frits van Bommel]

Serg Kovrov wrote:
> * Oskar Linde:
>> Counting the number of characters is also a rather expensive
>> operation. 
> 
> Indeed. Store once as property (and update as needed) is better than 
> calculate it each time you need it.

Store where? You can't put it in the array data itself without breaking 
slicing, and you putting it in the reference introduces problems with it 
getting out of date if the array is modified through another reference 
(without enforcing COW, that is).