Using fs.memoryfs.MemoryFS for speedups?

[twardoch]

ufoLib2 uses PyFilesystem2 ("fs"). There is fs.memoryfs.MemoryFS — has anyone tried it for potential speedups?

I mean, fontmake, glyphsLib etc. might yield speedups if the DesignSpace+UFO intermediates are written into MemoryFS

[anthrotype]

ufoLib2 Font already supports fs objects as input or output. They are passed on to ufoLib's UFOReader/Writer. What is the exact feature request for ufoLib2 proper?