improve speed of cubic_hermite_interpolate
improve speed of cubic_hermite_interpolate

Traksewt/pv,Traksewt/pv,CyrusBiotechnology/pv,Traksewt/pv,biasmv/pv,CyrusBiotechnology/pv,biasmv/pv,yuhangwang/pv,biasmv/pv,CyrusBiotechnology/pv,yuhangwang/pv,yuhangwang/pv,CyrusBiotechnology/pv,biasmv/pv,Traksewt/pv,yuhangwang/pv