Raised executable priority on windows to avoid stuter, helps #25162

platform/windows/detect.py

@@ -218,7 +218,7 @@ def configure_msvc(env, manual_msvc_config):
 
     LIBS = ['winmm', 'opengl32', 'dsound', 'kernel32', 'ole32', 'oleaut32',
             'user32', 'gdi32', 'IPHLPAPI', 'Shlwapi', 'wsock32', 'Ws2_32',
-            'shell32', 'advapi32', 'dinput8', 'dxguid', 'imm32', 'bcrypt']
+	    'shell32', 'advapi32', 'dinput8', 'dxguid', 'imm32', 'bcrypt','Avrt']
     env.Append(LINKFLAGS=[p + env["LIBSUFFIX"] for p in LIBS])
 
     if manual_msvc_config:
@@ -329,7 +329,7 @@ def configure_mingw(env):
     env.Append(CCFLAGS=['-DRTAUDIO_ENABLED'])
     env.Append(CCFLAGS=['-DWASAPI_ENABLED'])
     env.Append(CCFLAGS=['-DWINVER=%s' % env['target_win_version'], '-D_WIN32_WINNT=%s' % env['target_win_version']])
-    env.Append(LIBS=['mingw32', 'opengl32', 'dsound', 'ole32', 'd3d9', 'winmm', 'gdi32', 'iphlpapi', 'shlwapi', 'wsock32', 'ws2_32', 'kernel32', 'oleaut32', 'dinput8', 'dxguid', 'ksuser', 'imm32', 'bcrypt'])
+    env.Append(LIBS=['mingw32', 'opengl32', 'dsound', 'ole32', 'd3d9', 'winmm', 'gdi32', 'iphlpapi', 'shlwapi', 'wsock32', 'ws2_32', 'kernel32', 'oleaut32', 'dinput8', 'dxguid', 'ksuser', 'imm32', 'bcrypt','avrt'])
 
     env.Append(CPPFLAGS=['-DMINGW_ENABLED'])
 

platform/windows/os_windows.cpp

@@ -50,6 +50,7 @@
 #include "servers/visual/visual_server_raster.h"
 #include "servers/visual/visual_server_wrap_mt.h"
 #include "windows_terminal_logger.h"
+#include <avrt.h>
 
 #include <process.h>
 #include <regstr.h>
@@ -1373,6 +1374,19 @@ Error OS_Windows::initialize(const VideoMode &p_desired, int p_video_driver, int
 
 	set_ime_active(false);
 
+	if (!OS::get_singleton()->is_in_low_processor_usage_mode()) {
+		//SetPriorityClass(GetCurrentProcess(), ABOVE_NORMAL_PRIORITY_CLASS);
+		SetPriorityClass(GetCurrentProcess(), ABOVE_NORMAL_PRIORITY_CLASS);
+		DWORD index = 0;
+		HANDLE handle = AvSetMmThreadCharacteristics("Games", &index);
+		if (handle)
+			AvSetMmThreadPriority(handle, AVRT_PRIORITY_CRITICAL);
+
+		// This is needed to make sure that background work does not starve the main thread.
+		// This is only setting priority of this thread, not the whole process.
+		SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
+	}
+
 	return OK;
 }