[C++] Enable SIMD for Byte Stream Split with 2 streams #46788
Description
Describe the enhancement requested
ByteStreamSplitEncode / ByteStreamSplitDecode does not use SIMD instruction when NumStreams == 2.
A performance improvement is to add support for it in ByteStreamSplitEncodeSimd128 / ByteStreamSplitDecodeSimd128.
Component(s)
C++