diff --git a/components/mbedtls/port/esp_ds/esp_rsa_dec_alt.c b/components/mbedtls/port/esp_ds/esp_rsa_dec_alt.c
index 9fea5655cb..9ef5071a75 100644
--- a/components/mbedtls/port/esp_ds/esp_rsa_dec_alt.c
+++ b/components/mbedtls/port/esp_ds/esp_rsa_dec_alt.c
@@ -62,6 +62,9 @@ static int esp_ds_rsaes_pkcs1_v15_unpadding(unsigned char *input,
     }
 
     /* Verify padding bytes are non-zero in constant time */
+#if defined(__clang__) && defined(__xtensa__)
+    #pragma clang loop vectorize(disable)
+#endif
     for (size_t i = 2; i < ilen; i++) {
         unsigned char in_padding = (i < pad_count + 2);
         unsigned char is_zero = (input[i] == 0x00);
diff --git a/tools/test_apps/system/clang_build_test/sdkconfig.ci.clang_libclang_rt_perf b/tools/test_apps/system/clang_build_test/sdkconfig.ci.clang_libclang_rt_perf
new file mode 100644
index 0000000000..aabe834d36
--- /dev/null
+++ b/tools/test_apps/system/clang_build_test/sdkconfig.ci.clang_libclang_rt_perf
@@ -0,0 +1,2 @@
+CONFIG_COMPILER_RT_LIB_CLANGRT=y
+CONFIG_COMPILER_OPTIMIZATION_PERF=y