sf::Texture initial slowdown

[CDoughty08]

First off thank you for your time.

I am noticing a seemingly odd slowdown with sf::Texture I can't seem to track down.
I built SFML from sources as a dynamic library ( possibly delayed DLL loading? )

Running in Debug build/Release build has absolutely no effect as well.
Relevant Snippets:
Test case

int main(int argc, char* argv[])
{
    size_t start = GetTickCount();
        size_t end = 0;
        sf::Texture tex;
        end = GetTickCount();

        printf("\nRuntime: %dms\n", (end - start));
        return 0;
}
 

Output average over 20 tries:
Runtime: 157ms

Any ideas on what causes this?

[eXpl0it3r]

So what's the issue? Creating a texture will setup all kinds of OpenGL stuff (context etc). Are you really worried about 157ms at startup?

If it is bothering you, use the proper tool, i.e. a profiler, and find out what happens.

[Dejan Geci]

How about this?

int main(int argc, char* argv[])
{
    sf::Texture texInit;

    size_t start = GetTickCount();
    size_t end = 0;
    sf::Texture tex;
    end = GetTickCount();

    printf("\nRuntime: %dms\n", (end - start));
        return 0;
}

[Jesper Juhl]

As eXploit3r already said, is this really a problem?
Yes, creating a new texture takes some time, but you usually do that rarely. So it's usually no big deal.
But yes, ~150ms is quite a long time, is this an optimized build?

[CDoughty08]

It is not an "issue" per se. More curiosity than anything.
What does OpenGL have to do with it at that point though? The constructor for sf::Texture is empty and nothing in the initializer list seems to ask for a gl context?

Release -O2 is 140-150ms

[zsbzsb]

...... you really can't find it yourself??  Just because a ctor is empty doesn't mean there isn't a parent class ctor to execute.

https://github.com/SFML/SFML/blob/master/include/SFML/Graphics/Texture.hpp#L47

https://github.com/SFML/SFML/blob/master/src/SFML/Window/GlResource.cpp#L53

[eXpl0it3r]

As I said, if you're curious run a profiler. It most likely will spend some time in the graphics driver.