Thanks for you suggestion, but indeed I dont dare to touch the MFT ( which is far beyond my ability and resources ) Ha!

I had added a rewrite to my OP which can run as fast as dir does, and I think that's good enough for me, but please help to point out if there's any potential problems there. Thanks a lot!

In reply to Re^2: use threads for dir tree walking really hurts (MFT?) by exilepanda
in thread use threads for dir tree walking really hurts by exilepanda

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