Re: `aset` on strings, changing the size in bytes

[Stefan Monnier]

>> The need for an indirection (a String_Object has to hold a pointer to an
>> sdata object rather than being able to keep its payload directly in the
>> Lisp_String object (using FLEXIBLE_ARRAY_MEMBER))
> Why is that a problem?

It slows down every string access, and increases the heap size of every
string (currently they're something like N bytes of payload plus
5 words where 2 of those 5 words are due to the extra indirection).

For a feature that's almost never used, I think it's pretty costly.


        Stefan