Re: subbytevectors

[Ludovic Courtès]

Hi,

Andy Wingo <address@hidden> skribis:

> On Mon 11 Jun 2012 13:55, address@hidden (Ludovic Courtès) writes:
>
>> What about using copying (or rather, copy-on-write) sub-bytevectors to
>> start with?  That would avoid the aliasing issue; OTOH COW would make
>> the implementation more complex.
>
> Not a bad idea.  The FFI can still introduce aliasing, though I don't
> know if that matters.  Alignment is still a problem though.  Plus it's a
> bit more complexity, though an optimizer should be able to do something
> about that.

Currently alignment is more of a theoretical problem because we are not
yet at a point where such an optimization matters (and I think it
wouldn’t matter on x86 anyway), no?  :-)

Though in principle, I agree we should avoid preventing future
optimizations.

Ludo’.