Re: Mercurial 0.3 vs git benchmarks

From: H. Peter Anvin
Date: Wed Apr 27 2005 - 14:00:20 EST

Thomas Glanzmann wrote:

For tar I have no idea why it should slow down the operation, but maybe
you can enlighten us.

Directory hashing slows down operations that do linear sweeps through the filesystem reading every single file, simply because without dir_index, there is likely to be a correlation between inode order and directory order, whereas with dir_index, readdir() returns entries in hash order.

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