export const compute = ( options ) => { const { v1 , v2 } = options ; let d = 0 ; for ( let i = 0 ; i < v1 . length ; i ++ ) { let x = ( v1 [ i ] ^ v2 [ i ] ) >>> 0 ; d += bitCount ( x ) ; } return d ; } ; const bitCount = ( v ) => { var c = v - ( ( v >> 1 ) & 0x55555555 ) ; c = ( ( c >> 2 ) & 0x33333333 ) + ( c & 0x33333333 ) ; c = ( ( c >> 4 ) + c ) & 0x0F0F0F0F ; c = ( ( c >> 8 ) + c ) & 0x00FF00FF ; c = ( ( c >> 16 ) + c ) & 0x0000FFFF ; return c ; } ;