Modified low processor sleep to 8000 and made it customizable (should be customizable for editor too)

core/os/os.cpp

@@ -122,6 +122,16 @@ bool OS::is_in_low_processor_usage_mode() const {
 	return low_processor_usage_mode;
 }
 
+void OS::set_low_processor_usage_mode_sleep_usec(int p_usec) {
+
+	low_processor_usage_mode_sleep_usec = p_usec;
+}
+
+int OS::get_low_processor_usage_mode_sleep_usec() const {
+
+	return low_processor_usage_mode_sleep_usec;
+}
+
 void OS::set_clipboard(const String &p_text) {
 
 	_local_clipboard = p_text;
@@ -599,6 +609,7 @@ OS::OS() {
 	singleton = this;
 	_keep_screen_on = true; // set default value to true, because this had been true before godot 2.0.
 	low_processor_usage_mode = false;
+	low_processor_usage_mode_sleep_usec = 10000;
 	_verbose_stdout = false;
 	_no_window = false;
 	_exit_code = 0;

core/os/os.h

@@ -50,6 +50,7 @@ class OS {
 	List<String> _cmdline;
 	bool _keep_screen_on;
 	bool low_processor_usage_mode;
+	int low_processor_usage_mode_sleep_usec;
 	bool _verbose_stdout;
 	String _local_clipboard;
 	uint64_t _msec_splash;
@@ -202,6 +203,8 @@ public:
 	virtual bool is_keep_screen_on() const;
 	virtual void set_low_processor_usage_mode(bool p_enabled);
 	virtual bool is_in_low_processor_usage_mode() const;
+	virtual void set_low_processor_usage_mode_sleep_usec(int p_usec);
+	virtual int get_low_processor_usage_mode_sleep_usec() const;
 
 	virtual String get_executable_path() const;
 	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false) = 0;

main/main.cpp

@@ -910,6 +910,9 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		frame_delay = GLOBAL_DEF("application/run/frame_delay_msec", 0);
 	}
 
+	OS::get_singleton()->set_low_processor_usage_mode(GLOBAL_DEF("application/run/low_processor_mode", false));
+	OS::get_singleton()->set_low_processor_usage_mode_sleep_usec(GLOBAL_DEF("application/run/low_processor_mode_sleep_usec", 8000));
+
 	Engine::get_singleton()->set_frame_delay(frame_delay);
 
 	message_queue = memnew(MessageQueue);
@@ -1773,7 +1776,7 @@ bool Main::iteration() {
 		return exit;
 
 	if (OS::get_singleton()->is_in_low_processor_usage_mode() || !OS::get_singleton()->can_draw())
-		OS::get_singleton()->delay_usec(16600); //apply some delay to force idle time (results in about 60 FPS max)
+		OS::get_singleton()->delay_usec(OS::get_singleton()->get_low_processor_usage_mode_sleep_usec()); //apply some delay to force idle time (results in about 60 FPS max)
 	else {
 		uint32_t frame_delay = Engine::get_singleton()->get_frame_delay();
 		if (frame_delay)