Faster Array#/MutableArray# copies
rl at cse.unsw.edu.au
Fri Feb 18 10:00:11 CET 2011
Johan Tibell wrote:
> * Could we use built-in compiler rules to catch array copies of known
> length and replace them with e.g. unrolled loops? My particular use case
> involves copying small arrays (size: 1-32). Ideally this should be as fast
> as copying a tuple of the corresponding size but I'm pretty sure we're far
> off that goal.
Out of idle curiousity, couldn't you use tuples instead of arrays?
FWIW, I agree that doing something cleverer than just calling memcpy could
be very worthwhile. As Max points out, you could perhaps try to do
something with the LLVM backend.
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