const math/big._S

11 uses

	math/big (current package)
		arith.go#L19: 	_S = _W / 8 // word size in bytes
		floatmarsh.go#L41: 		sz += 4 + n*_S // exp + mant
		int.go#L527: 	buf := make([]byte, len(x.abs)*_S)
		intmarsh.go#L22: 	buf := make([]byte, 1+len(x.abs)*_S) // extra byte for version and sign bit
		nat.go#L1313: 		for j := 0; j < _S; j++ {
		nat.go#L1345: 	z = z.make((len(buf) + _S - 1) / _S)
		nat.go#L1348: 	for k := 0; i >= _S; k++ {
		nat.go#L1349: 		z[k] = bigEndianWord(buf[i-_S : i])
		nat.go#L1350: 		i -= _S
		ratmarsh.go#L24: 	buf := make([]byte, 1+4+(len(x.a.abs)+len(x.b.abs))*_S) // extra bytes for version and sign bit (1), and numerator length (4)