diff --git a/core/templates/command_queue_mt.cpp b/core/templates/command_queue_mt.cpp
index d9e5e0b2178..ef75a70868e 100644
--- a/core/templates/command_queue_mt.cpp
+++ b/core/templates/command_queue_mt.cpp
@@ -42,6 +42,7 @@ void CommandQueueMT::unlock() {
 }
 
 CommandQueueMT::CommandQueueMT() {
+	command_mem.reserve(DEFAULT_COMMAND_MEM_SIZE_KB * 1024);
 }
 
 CommandQueueMT::~CommandQueueMT() {
diff --git a/core/templates/command_queue_mt.h b/core/templates/command_queue_mt.h
index dbf938a117e..349404d75bd 100644
--- a/core/templates/command_queue_mt.h
+++ b/core/templates/command_queue_mt.h
@@ -325,9 +325,7 @@ class CommandQueueMT {
 
 	/***** BASE *******/
 
-	enum {
-		DEFAULT_COMMAND_MEM_SIZE_KB = 256,
-	};
+	static const uint32_t DEFAULT_COMMAND_MEM_SIZE_KB = 64;
 
 	BinaryMutex mutex;
 	LocalVector<uint8_t> command_mem;