GLFW窗口需要一段时间才能打开

Question

GLFW窗口大约需要1秒才能打开吗？

std::cout << glfwGetTime() << '\n';
//glfwWindowHint(GLFW_DECORATED,0);//removes window borders for next created window
GLFWwindow * mainwindow = glfwCreateWindow(600,400,"FreemanGL",0,0);
std::cout << glfwGetTime();

第一个计时器小于0.009秒，第二个计时器大约1.05秒。