> GTK4

After my comment https://news.ycombinator.com/item?id=49235430 I've investigated the high RAM jump issue a bit further. It turned out, 60 MB comes from MESA / video graphics driver, right after the first function call, that triggers OpenGL/... context initialization. Thus:

  GTK2 14 MB
  GTK3 24 MB
  GTK4 38 MB  (+ 60 MB video acceleration)

Looks a bit better. But we still need 98 MB total.