On Wed, 13 Apr 2005 21:19:48 -0700, H. Peter Anvin wrote:
> Checking out the total kernel tree (time checkout-cache -a into an empty
> directory):
>
> Cache cold Cache hot
> stock 3:46.95 19.95
> base64 5:56.20 23.74
> flat 2:44.13 15.68
>
> It seems that the flat format, at least on ext3 with dircache, is
> actually a major performance win, and that the second level loses quite
> a bit.
Since 160-bits does not go into base64 evenly anyways, what happens if
you use 2^10 instead of 2^12 for the subdir names? That will be 1/4 the
directories of the base64 given above.
-Paul
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