Re: new module 'aligned-malloc'

[Paul Eggert]

On 7/22/20 4:04 PM, Bruno Haible wrote:

> Probably most posix_memalign / memalign implementations will round up the
> request to a 16-bytes allocation. But if some implementation can give me just
> 8 bytes, properly aligned, without wasting the next 8 bytes, why should I not
> make use of it?

I suspect the scenario you're suggesting isn't worth the hassle of doing the 
optimization. And quite possibly it wouldn't be an optimization at all, as 
"wasting" the next 8 bytes could improve CPU performance significantly for some 
apps on hardware platforms with split i and d caches where writing to the d 
cache invalidates the i cache of the same cache line.

Anyway, thanks for letting me know the application you had in mind.