diff --git a/core/vm/instructions_test.go b/core/vm/instructions_test.go
index 14f9e181f..d17ccfab8 100644
--- a/core/vm/instructions_test.go
+++ b/core/vm/instructions_test.go
@@ -40,6 +40,7 @@ type twoOperandParams struct {
 	y string
 }
 
+var alphabetSoup = "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
 var commonParams []*twoOperandParams
 var twoOpMethods map[string]executionFunc
 
@@ -347,8 +348,8 @@ func BenchmarkOpSub256(b *testing.B) {
 }
 
 func BenchmarkOpMul(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opMul, x, y)
 }
@@ -379,64 +380,64 @@ func BenchmarkOpSdiv(b *testing.B) {
 }
 
 func BenchmarkOpMod(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opMod, x, y)
 }
 
 func BenchmarkOpSmod(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opSmod, x, y)
 }
 
 func BenchmarkOpExp(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opExp, x, y)
 }
 
 func BenchmarkOpSignExtend(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opSignExtend, x, y)
 }
 
 func BenchmarkOpLt(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opLt, x, y)
 }
 
 func BenchmarkOpGt(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opGt, x, y)
 }
 
 func BenchmarkOpSlt(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opSlt, x, y)
 }
 
 func BenchmarkOpSgt(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opSgt, x, y)
 }
 
 func BenchmarkOpEq(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opEq, x, y)
 }
@@ -446,45 +447,45 @@ func BenchmarkOpEq2(b *testing.B) {
 	opBenchmark(b, opEq, x, y)
 }
 func BenchmarkOpAnd(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opAnd, x, y)
 }
 
 func BenchmarkOpOr(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opOr, x, y)
 }
 
 func BenchmarkOpXor(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opXor, x, y)
 }
 
 func BenchmarkOpByte(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
 
 	opBenchmark(b, opByte, x, y)
 }
 
 func BenchmarkOpAddmod(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	z := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
+	z := alphabetSoup
 
 	opBenchmark(b, opAddmod, x, y, z)
 }
 
 func BenchmarkOpMulmod(b *testing.B) {
-	x := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	y := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
-	z := "ABCDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff"
+	x := alphabetSoup
+	y := alphabetSoup
+	z := alphabetSoup
 
 	opBenchmark(b, opMulmod, x, y, z)
 }