Re: [PATCH 0/7] RFC: Accelerate xdiff and begin its rustification

Phillip Wood [off-list ref] writes:

... by 15%. Just over half of that seems to come from hoisting the
check for whitespace flags in xdl_hash_record() out of the loop
in xdl_prepare_ctx() and the rest comes from the change in hash
function.

The first half of that alone is interesting enough ;-).

As I understand it the hash is implemented using SIMD
compiler intrinsics and the rust implementation is basically a
copy of the C code in libxxhash. I wonder how well xxhash performs
compared to our existing hash on platforms without an optimized
implementation.

Yeah, that indeed is worth investigating.

Thanks.