Disabling vulkan debug layers in release builds by default.
diff --git a/runtime/src/iree/hal/drivers/vulkan/registration/driver_module.cc b/runtime/src/iree/hal/drivers/vulkan/registration/driver_module.cc
index e3c5bcc..aad3301 100644
--- a/runtime/src/iree/hal/drivers/vulkan/registration/driver_module.cc
+++ b/runtime/src/iree/hal/drivers/vulkan/registration/driver_module.cc
@@ -14,9 +14,15 @@
#include "iree/base/tracing.h"
#include "iree/hal/drivers/vulkan/api.h"
-IREE_FLAG(bool, vulkan_validation_layers, true,
+#ifndef NDEBUG
+#define IREE_HAL_VULKAN_DEBUG_FLAG_DEFAULT true
+#else
+#define IREE_HAL_VULKAN_DEBUG_FLAG_DEFAULT false
+#endif // !NDEBUG
+
+IREE_FLAG(bool, vulkan_validation_layers, IREE_HAL_VULKAN_DEBUG_FLAG_DEFAULT,
"Enables standard Vulkan validation layers.");
-IREE_FLAG(bool, vulkan_debug_utils, true,
+IREE_FLAG(bool, vulkan_debug_utils, IREE_HAL_VULKAN_DEBUG_FLAG_DEFAULT,
"Enables VK_EXT_debug_utils, records markers, and logs errors.");
IREE_FLAG(bool, vulkan_tracing, true,
