alt Hacker NewsThis took me down a rabbit whole. Why can a simple single purpose app not be just a couple megabytes if not less? The popular options are electron 100MB+, or embedding python3 in your executable which is at least 40MB.
But if you build it natively, you should have all of Microsoft tools at your disposition, dlls and such. In theory, this should allow you to make a 1 mb app or less. But in practice, it's the worse option.
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It can, but you have to know what you’re doing and you have to know it very well.
Looking at the opposite extreme, the guy that originally wrote the windows task manager (the thing that popped put when you pressed ctrl+alt+canc) posted a video about cloning the windows basic text editor in a 3kb binary: https://youtu.be/OG91c7xsNMc
Needless to say, the guy knows what he’s doing.
Pictures and frame buffers. If you're running fullscreen at 4k, you're probably gonna take two roughly 3840x2160x3 byte frame buffers for the window. Your designers want a background image which moves as you scroll in some parallax style; that's over 3840x2160x3 bytes more for the pixel buffer backing the image layer. And let's say roughly 50% of your screen is text with subpixel (aka full color) anti aliasing; that means another 3840x2160x3x0.5 bytes for the pre rendered text.
3840x2160x3x3.5. That's 87MB, in pixel data only. And it's a very minimal example; for the parallax image, you're gonna want the image to be significantly taller than the window; you're gonna want a ton of smaller (tho still high DPI) images for icons; a few different font atlases for different font faces you've loaded at once; maybe pre rendered pixel buffers for all sorts of UI components; etc.
And lord help you if your designers want any part of this to be animated.
(I'm playing a bit fast and loose with what lives on the GPU and what lives on the CPU here. On many systems, they share a memory pool anyway. But on systems with discrete GPUs, most of this is gonna be video memory. Though applications may wanna store CPU-side copies as well for various reasons.)