diff --git a/misc/Makefile b/misc/Makefile
new file mode 100644
index 0000000..1a727f3
--- /dev/null
+++ b/misc/Makefile
@@ -0,0 +1,6 @@
+all: low_test
+
+CFLAGS=-I ../include/ -m32 -Ofast -Wall -Wextra -DNDEBUG
+
+low_test: low_test.cpp
+	$(CXX) -o low_test low_test.cpp $(CFLAGS)
diff --git a/misc/low_test.cpp b/misc/low_test.cpp
index 62f84af..856be61 100644
--- a/misc/low_test.cpp
+++ b/misc/low_test.cpp
@@ -142,10 +142,13 @@ void montTest(const char *pStr)
 		mcl::montT<N>(z, x, y, p);
 		CYBOZU_TEST_EQUAL_ARRAY(z, vz.getUnit(), N);
 	}
+	CYBOZU_BENCH_C("montT", 10000, mcl::montT<N>, z, x, y, p);
 }
 
 CYBOZU_TEST_AUTO(mont)
 {
-	const char *pStr = "0x2523648240000001ba344d80000000086121000000000013a700000000000013";
-	montTest<8>(pStr);
+	const char *pBN254 = "0x2523648240000001ba344d80000000086121000000000013a700000000000013";
+	montTest<8>(pBN254);
+	const char *pBLS12_381 = "0x1a0111ea397fe69a4b1ba7b6434bacd764774b84f38512bf6730d2a0f6b0f6241eabfffeb153ffffb9feffffffffaaab";
+	montTest<12>(pBLS12_381);
 }