The discussion is not about increasing the hashing speed itself but about improving the performance of the FileManager when it has to browse through the directory trees to find shared files. You shouldn't expect any substantial improvements if you aren't sharing large numbers of files >> 1000.

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Morgens ess ich Cornflakes und abends ess ich Brot
Und wenn ich lang genug gelebt hab, dann sterb ich und bin tot

--Fischmob