diff --git a/be/src/exprs/string_functions.h b/be/src/exprs/string_functions.h
index f1a4df9e373f51..62e5377e122b18 100644
--- a/be/src/exprs/string_functions.h
+++ b/be/src/exprs/string_functions.h
@@ -181,9 +181,16 @@ class StringFunctions {
     };
 
     static StringVal do_money_format(FunctionContext *context, const std::string& v) {
-        std::locale comma_locale(std::locale(), new CommaMoneypunct ());
-        std::stringstream ss;
-        ss.imbue(comma_locale);
+        static std::locale comma_locale(std::locale(), new CommaMoneypunct());
+        static std::stringstream ss;
+        static bool ss_init = false;
+        if (UNLIKELY(!ss_init)) {
+            ss.imbue(comma_locale);
+            ss_init = true;
+        }
+        static std::string empty_string;
+        ss.str(empty_string);
+
         ss << std::put_money(v);
         return AnyValUtil::from_string_temp(context, ss.str());
     };
diff --git a/be/test/exprs/string_functions_test.cpp b/be/test/exprs/string_functions_test.cpp
index 77217512fb5af9..165ee79704287f 100644
--- a/be/test/exprs/string_functions_test.cpp
+++ b/be/test/exprs/string_functions_test.cpp
@@ -41,6 +41,16 @@ class StringFunctionsTest : public testing::Test {
     FunctionContext* ctx;
 };
 
+TEST_F(StringFunctionsTest, do_money_format_bench) {
+    doris_udf::FunctionContext* context = new doris_udf::FunctionContext();
+    StringVal expected = AnyValUtil::from_string_temp(context, std::string("9,223,372,036,854,775,807.00"));
+    for (int i = 0; i < 10000000; i++) {
+        StringVal result = StringFunctions::do_money_format(context, "922337203685477580700");  // cent
+        ASSERT_EQ(expected, result);
+    }
+    delete context;
+}
+
 TEST_F(StringFunctionsTest, money_format_bigint) {
     doris_udf::FunctionContext* context = new doris_udf::FunctionContext();