OpenGLES • Having trouble getting any approach to render an empty window at 60FPS

Code:

#include <GL/glew.h>#include <GL/freeglut.h>#include <GL/glu.h>#include <stdio.h>#include <string.h>#include <sys/time.h>#include <math.h>int frameCount = 0;struct timeval tv;unsigned long time_in_micros;unsigned long oldTime;void renderFunction(void) {    frameCount++;    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);    glutSwapBuffers();    if (frameCount % 10 == 0) {        oldTime = time_in_micros;        gettimeofday(&tv,NULL);        time_in_micros = 1000000 * tv.tv_sec + tv.tv_usec;        printf("Interframe time is %f\n", (float)(time_in_micros-oldTime)/10000);    }}void idleFunction(void) {  glutPostRedisplay();}int main(int argc, char* argv[]) {    gettimeofday(&tv,NULL);    time_in_micros = 1000000 * tv.tv_sec + tv.tv_usec;    glutInit(&argc, argv);    glewExperimental = GL_TRUE;    glewInit();    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);    int windowHandle = glutCreateWindow("Animation Across the nation");    //glutFullScreen();    glutDisplayFunc(renderFunction);    glutIdleFunc(idleFunction);    glutMainLoop();    exit(EXIT_SUCCESS);}

Code:

#include <stdio.h>#include <GLFW/glfw3.h>#include <sys/time.h>struct timeval tv;unsigned long  frameCount = 0,  time_in_micros,  oldTime;int main(void) {    glfwInit();    GLFWmonitor* primaryMonitor = glfwGetPrimaryMonitor();    const GLFWvidmode* mode = glfwGetVideoMode(primaryMonitor);        //Swapping between these two versions are what causes problems.    //GLFWwindow* window = glfwCreateWindow(1920, 1180, "My Title", NULL, NULL);    GLFWwindow* window = glfwCreateWindow(1920, 1200, "My Title", primaryMonitor, NULL);    glfwMakeContextCurrent(window);    glfwSwapInterval(0);    while (!glfwWindowShouldClose(window)) {        frameCount++;        glfwSwapBuffers(window);        if (frameCount % 10 == 0) {            oldTime = time_in_micros;            gettimeofday(&tv,NULL);            time_in_micros = 1000000 * tv.tv_sec + tv.tv_usec;            printf("Interframe time is %f\n", (float)(time_in_micros-oldTime)/10000);        }    }    glfwTerminate();    return 0;}