Replacing C's memcpy with a D implementation

[Mike Franklin]

On Sunday, 10 June 2018 at 13:17:53 UTC, Guillaume Piolat wrote:

> Please make one that guarantee the usage of the corresponding 
> backend intrinsic, for example on LLVM.

I tested with ldc and got similar results.  I thought the 
implementation in C forwarded to the backend intrinsic.  I think 
even LDC links with GCC, and the distribution of GCC is tuned for 
a given platform and architecture, so am I not already utilizing 
GCC's backend intrinsic.

Also, I'm not trying to find the holy grail of memcpy with this 
endeavor.  I just want to find something as good or better than 
what the druntime is currently using, but implemented in D.  Even 
if it's not optimal, if it's as good as what druntime is 
currently using, I want to replace those calls in the runtime 
with a D implementation.

Mike