gl-rs: Slow build time for gl::load_with usages

On my i5-3550 this code takes 3.2 seconds to build, which is quite a bit taking into account it is only loading the OpenGL library.

extern crate glutin;
extern crate gl;

fn main() {
    let window = glutin::Window::new().unwrap();
    unsafe { window.make_current() };
    gl::load_with(|symbol| window.get_proc_address(symbol));
}

It was tested with rustc 1.0.0-nightly (dfc5c0f1e 2015-02-18).

About this issue

Original URL
State: closed
Created 9 years ago
Reactions: 1
Comments: 15 (12 by maintainers)

Most upvoted comments

Now that I think about it, I would probably also create an inner function inside gl::load_with which takes &mut dyn FnMut and is also marked with #[inline(never)]. The outer gl::load_with would then only call the inner one. That way, the 700 calls are not inlined into user code.

I could submit this as PR, if you want. Or do you want to do it?

LukasKalbertodt on Jul 4, 2019

Published!

brendanzab on Jul 9, 2019

I’m pretty sure we removed the templates… I might not have remembered to close this issue

brendanzab on Oct 15, 2018