support parallel mean
support parallel mean

jriehl/numba,stonebig/numba,gmarkall/numba,gmarkall/numba,gmarkall/numba,stuartarchibald/numba,sklam/numba,IntelLabs/numba,numba/numba,numba/numba,IntelLabs/numba,sklam/numba,sklam/numba,cpcloud/numba,seibert/numba,IntelLabs/numba,stuartarchibald/numba,gmarkall/numba,jriehl/numba,stonebig/numba,stonebig/numba,cpcloud/numba,stuartarchibald/numba,stonebig/numba,sklam/numba,jriehl/numba,jriehl/numba,cpcloud/numba,jriehl/numba,gmarkall/numba,numba/numba,seibert/numba,numba/numba,numba/numba,seibert/numba,cpcloud/numba,stuartarchibald/numba,stonebig/numba,IntelLabs/numba,seibert/numba,seibert/numba,stuartarchibald/numba,sklam/numba,cpcloud/numba,IntelLabs/numba