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Comment by magackame

I think you guys on HN can be a bit out of touch maybe? On my linux machine (measured with tux-manager):

  nautilus                            177 MB
  kitty                               150 MB
  alacritty                           107 MB
  mpv --idle --force-window           160 MB
  winit empty window + OpenGL context 100 MB
  tux-manager                         69  MB
  hexchat                             55  MB
  gnome-terminal                      47  MB
  st                                  12  MB
  xterm                               12  MB
All these apps are what you would consider native, good apps. Written with Qt, GTK, some in low level langs like C\C++, Rust as well. There is of course different ways to measure the usage and maybe some more testing needs to be done, but stuff like 1-10 MB seems completely unrealistic. I think any empty Qt/GTK app eats 40 MB at least. Only thing that even gets close is st at 12 MB. And mind you it's a terminal (which is 1000x simpler than any modern GUI app, doesn't load any assets etc) and it doesn't even use any GPU accel (which itself seem to add a lot of baseline cost).

Honestly I was a bit surprised myself. I have a Rust winit + ash vulkan hardcoded triangle demo app and it eats 86 MB (the binary itself is 5.5 MB). I would love to know, if anyone could explain why GPU accel seems to eat up so much RAM. Like yeah, there are a bunch of images that live on swapchain, but they should all be in VRAM. Outside of that I don't see what would require MBs worth of overhead.

parent magackame 2 months ago

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