diff --git a/GUI/host/host.cc b/GUI/host/host.cc
index 4f4c38b..fc89755 100644
--- a/GUI/host/host.cc
+++ b/GUI/host/host.cc
@@ -25,7 +25,7 @@ namespace
 	std::unordered_map<ThreadParam, TextThread*> textThreadsByParams;
 	std::unordered_map<DWORD, ProcessRecord> processRecordsByIds;
 
-	std::recursive_mutex hostMutex;
+	WinMutex hostMutex;
 
 	DWORD DUMMY[100];
 	ThreadParam CONSOLE{ 0, -1ULL, -1ULL, -1ULL };
diff --git a/GUI/host/textthread.h b/GUI/host/textthread.h
index c9974f3..0ee7ea5 100644
--- a/GUI/host/textthread.h
+++ b/GUI/host/textthread.h
@@ -28,7 +28,7 @@ private:
 
 	std::vector<char> buffer;
 	std::wstring storage;
-	std::recursive_mutex ttMutex;
+	WinMutex ttMutex;
 
 	HANDLE deletionEvent = CreateEventW(nullptr, FALSE, FALSE, NULL);
 	std::thread flushThread = std::thread([&]() { while (WaitForSingleObject(deletionEvent, 100) == WAIT_TIMEOUT) Flush(); });
diff --git a/include/types.h b/include/types.h
index 0755013..efd8847 100644
--- a/include/types.h
+++ b/include/types.h
@@ -68,4 +68,15 @@ struct HookRemovedNotif // From hook
 	unsigned __int64 address;
 };
 
-typedef std::lock_guard<std::recursive_mutex> LOCK;
+// Artikash 8/28/2018: similar to std::recursive_mutex but uses WinAPI for better performance
+class WinMutex
+{
+	CRITICAL_SECTION cs;
+public:
+	WinMutex() { InitializeCriticalSection(&cs); };
+	~WinMutex() { EnterCriticalSection(&cs); LeaveCriticalSection(&cs); DeleteCriticalSection(&cs); };
+	void lock() { EnterCriticalSection(&cs); };
+	void unlock() { LeaveCriticalSection(&cs); };
+};
+
+typedef std::lock_guard<WinMutex> LOCK;