diff --git a/lang/fastrand/fastrand.go b/lang/fastrand/fastrand.go
index 862654c6..58a7cc72 100644
--- a/lang/fastrand/fastrand.go
+++ b/lang/fastrand/fastrand.go
@@ -129,22 +129,19 @@ func Uint64n(n uint64) uint64 {
 // It is safe for concurrent use.
 func Read(p []byte) (int, error) {
 	l := len(p)
-
 	if l == 0 {
 		return 0, nil
 	}
 
 	// Used for local XORSHIFT.
-	var tmp [2]uint32
-	tmp[0], tmp[1] = Uint32(), Uint32()
+	// Xorshift paper: https://www.jstatsoft.org/article/view/v008i14/xorshift.pdf
+	s0, s1 := Uint32(), Uint32()
 
 	if l >= 4 {
 		var i int
 		uint32p := *(*[]uint32)(unsafe.Pointer(&p))
-		s1, s0 := tmp[0], tmp[1]
 		for l >= 4 {
 			// Local XORSHIFT.
-			// Xorshift paper: https://www.jstatsoft.org/article/view/v008i14/xorshift.pdf
 			s1 ^= s1 << 17
 			s1 = s1 ^ s0 ^ s1>>7 ^ s0>>16
 			s0, s1 = s1, s0
@@ -153,13 +150,10 @@ func Read(p []byte) (int, error) {
 			i++
 			l -= 4
 		}
-		tmp[0], tmp[1] = s1, s0
 	}
 
 	if l > 0 {
 		// Local XORSHIFT.
-		// We don't need to save s0 and s1(tmp is not used).
-		s1, s0 := tmp[0], tmp[1]
 		s1 ^= s1 << 17
 		s1 = s1 ^ s0 ^ s1>>7 ^ s0>>16