I assume you're running proprietary drivers? Because I've never experienced anything like that on mesa. Launching an app that opens a window with a gl or vk context is so fast on my almost 10 year old hardware that it's nearly imperceptible.
There must be some quirk of whatever combination of software packages are installed there, but the proprietary drivers are not the culprit, at least not alone (i.e. there could be some interaction with other software packages with which I have little experience, like Gnome).
I have been using the proprietary NVIDIA drivers for more than 2 decades on various hardware, both desktops and laptops, mostly with Gentoo Linux.
Opening an OpenGL context or any other OpenGL operations have always been instant.
There must be some quirk of whatever combination of software packages are installed there, but the proprietary drivers are not the culprit, at least not alone (i.e. there could be some interaction with other software packages with which I have little experience, like Gnome).
I have been using the proprietary NVIDIA drivers for more than 2 decades on various hardware, both desktops and laptops, mostly with Gentoo Linux.
Opening an OpenGL context or any other OpenGL operations have always been instant.