2 files changed, 49 insertions, 0 deletions

diff --git a/core/config/engine.cpp b/core/config/engine.cpp
index e1da9eb44e..6606557fce 100644
--- a/core/config/engine.cpp
+++ b/core/config/engine.cpp
@@ -33,7 +33,9 @@
 #include "core/authors.gen.h"
 #include "core/config/project_settings.h"
 #include "core/donors.gen.h"
+#include "core/io/json.h"
 #include "core/license.gen.h"
+#include "core/os/os.h"
 #include "core/version.h"
 
 void Engine::set_physics_ticks_per_second(int p_ips) {
@@ -307,6 +309,43 @@ Engine::Engine() {
 	singleton = this;
 }
 
+void Engine::startup_begin() {
+	startup_benchmark_total_from = OS::get_singleton()->get_ticks_usec();
+}
+
+void Engine::startup_benchmark_begin_measure(const String &p_what) {
+	startup_benchmark_section = p_what;
+	startup_benchmark_from = OS::get_singleton()->get_ticks_usec();
+}
+void Engine::startup_benchmark_end_measure() {
+	uint64_t total = OS::get_singleton()->get_ticks_usec() - startup_benchmark_from;
+	double total_f = double(total) / double(1000000);
+
+	startup_benchmark_json[startup_benchmark_section] = total_f;
+}
+
+void Engine::startup_dump(const String &p_to_file) {
+	uint64_t total = OS::get_singleton()->get_ticks_usec() - startup_benchmark_total_from;
+	double total_f = double(total) / double(1000000);
+	startup_benchmark_json["total_time"] = total_f;
+
+	if (!p_to_file.is_empty()) {
+		Ref<FileAccess> f = FileAccess::open(p_to_file, FileAccess::WRITE);
+		if (f.is_valid()) {
+			Ref<JSON> json;
+			json.instantiate();
+			f->store_string(json->stringify(startup_benchmark_json, "\t", false, true));
+		}
+	} else {
+		List<Variant> keys;
+		startup_benchmark_json.get_key_list(&keys);
+		print_line("STARTUP BENCHMARK:");
+		for (const Variant &K : keys) {
+			print_line("\t-", K, ": ", startup_benchmark_json[K], +" sec.");
+		}
+	}
+}
+
 Engine::Singleton::Singleton(const StringName &p_name, Object *p_ptr, const StringName &p_class_name) :
 		name(p_name),
 		ptr(p_ptr),
diff --git a/core/config/engine.h b/core/config/engine.h
index 649be23717..b4364dbda4 100644
--- a/core/config/engine.h
+++ b/core/config/engine.h
@@ -79,6 +79,11 @@ private:
 	String write_movie_path;
 	String shader_cache_path;
 
+	Dictionary startup_benchmark_json;
+	String startup_benchmark_section;
+	uint64_t startup_benchmark_from = 0;
+	uint64_t startup_benchmark_total_from = 0;
+
 public:
 	static Engine *get_singleton();
 
@@ -151,6 +156,11 @@ public:
 	bool is_validation_layers_enabled() const;
 	int32_t get_gpu_index() const;
 
+	void startup_begin();
+	void startup_benchmark_begin_measure(const String &p_what);
+	void startup_benchmark_end_measure();
+	void startup_dump(const String &p_to_file);
+
 	Engine();
 	virtual ~Engine() {}
 };