Makie.jl [1] does it's plotting on the GPU (like a video game engine), so can handle millions of datapoints just fine.

Also, note that for people to whom plotting is really important, it's quite easy nowadays to just AOT compile your plotting library to your sysimage with PackageCompiler.jl [2] for instant plots.

[1] https://github.com/JuliaPlots/Makie.jl

[2] https://github.com/JuliaLang/PackageCompiler.jl