I was curious about that. I created a simple read-only test. I checked the testing in my src code directory from 19K files, 4K subdirectories and only 850 MB of disk space.
Performance performance .Net vs Node, in the case of a warm FS, was approximately equal to a tie.
5 ( ):
Node: 3.037, CLR: 2.976
w/cold numbers.
: https://github.com/ScottWeinstein/NodeVsNetFSPerf