Topics

1

General / Polling for events drastically lowers frame rate

« on: October 14, 2011, 01:29:54 am »

I am having a strange problem.

Anytime I am polling for events, my frame rate drops incredibly. Even more so if I am moving the mouse while polling for events.

For example, with this code:

Code: [Select]


#include <SFML/Graphics.hpp>


int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 800), "SFML window");


    while (window.IsOpened())
    {
        window.Clear();


        /*
        sf::Event event;
        while (window.PollEvent(event))
        {
            if (event.Type == sf::Event::Closed)
                window.Close();

            if (event.Type == sf::Event::KeyPressed)
            {
                if (event.Key.Code == sf::Keyboard::Key::Escape)
                    window.Close();
            }
        }
        */

        window.Display();
    }

    return EXIT_SUCCESS;

I get well over 1000 FPS with this code. When I uncomment the block polling for events, I get around 50 fps, and if I move my mouse around the window (slowly or quickly), it drops to a range of 1-20.

My specs are:
Q6600 Intel Core2Quad 2.66ghz
Nvidia GeForce GTX 260
3.5GB of RAM

I am using SFML 2.0

I don't think this is an SFML problem, as old programs I made in SFML 1.6 on a different computer, run slow as well on this computer. Also, my friend who also uses SFML 2.0, sent me a program he made that just displays the FPS in the graphics window. As I expected, I get the same low fps problem.

Are there any known issues that would cause this? I've already tried updating my graphics card drivers, and it hasn't helped.

Thanks.

Edit:

Operating system is Windows 7 32bit

Also, I have tried compiling my programs in both debug and release mode, as well as both dynamic linking and static linking, and I have the same issue.