sobomax 8d1fd0fff1 Replace hand-crafted naive byte-by-byte zero block detection routine ...

with macro based around memcmp(). The latter is expected to be some
8 times faster on a modern 64-bit architectures.

In practice, throughput of doing conv=sparse from /dev/zero to /dev/null
went up some 5-fold here from 1.9GB/sec to 9.7GB/sec with this change
(bs=128k).

MFC after:	2 weeks

2018-11-29 19:28:01 +00:00

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tests

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args.c

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conv_tab.c

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conv.c

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dd.1

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dd.c

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dd.h

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extern.h

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gen.c

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Makefile

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Makefile.depend

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misc.c

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position.c

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ref.ascii

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ref.ebcdic

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ref.ibm

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ref.lcase

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ref.obs_zeroes

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ref.oldascii

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ref.oldebcdic

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ref.oldibm

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ref.pareven

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ref.parnone

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ref.parodd

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ref.parset

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ref.swab

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ref.ucase

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