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Automatically exported from code.google.com/p/varsync
s2length in the original rsync depends on the file size and in most cases
it is about 2 or 3 bytes, while we use 8 bytes. This leads to decrease in
speedup. This decrease is significant for small files, but isn't
noticeable for bigger files.
There are some ways to improve situation (see source code for more
details).
Original issue reported on code.google.com by [email protected]
on 24 Jul 2009 at 11:12
At this time checksum1 converts one byte from buf to residue modulo
2^31-1. Unlike that, checksum2 uses PVAL() macro and convert _two_ bytes
from buf to residue. This gives good performance enhancement.
Original issue reported on code.google.com by [email protected]
on 25 Jul 2009 at 8:10
Checksum2 now converts 4 adjacent bytes to uint32 and then to residue
modulo 2^31-1. But you can easily generate two different tuples which will
be converted to different uint32 but to the same residue modulo 2^31-1!
Original issue reported on code.google.com by [email protected]
on 25 Jul 2009 at 6:13
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