Vector experiments, fixed atomic flag mistake, begin block-sync algorithm

experiments/mutex.cpp

@@ -46,7 +46,7 @@ int main() {
 	});
 	piCout << "stdMutex:" << stdMutexPerformance.get() << "ms";
 
-	std::atomic_flag stdAtomic;
+	std::atomic_flag stdAtomic = ATOMIC_FLAG_INIT;
 	auto stdAtomicPerformance = check_performance([&stdAtomic](){
 		while(stdAtomic.test_and_set(std::memory_order_acquire)) {
 			std::this_thread::yield();