I checked with heaptrack, the big allocation seems to be within scintilla data structures (which should be the same on notepad++ if I'm not mistaken ?). So like

I checked with heaptrack, the big allocation seems to be within scintilla data structures (which should be the same on notepad++ if I'm not mistaken ?). So likely some suboptimal thing here like having some cache somewhere which does not matter for the average text file.