- Update to 4.0.3
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svn2git
2021-03-31 03:12:20 +00:00
svn path=/head/; revision=543852
3 changed files with 9 additions and 27 deletions
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@ -2,15 +2,14 @@
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# $FreeBSD$
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PORTNAME= bit
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DISTVERSION= 1.1-15.2
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PORTREVISION= 1
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DISTVERSION= 4.0.3
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CATEGORIES= devel
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DISTNAME= ${PORTNAME}_${DISTVERSION}
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MAINTAINER= tota@FreeBSD.org
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COMMENT= Class for vectors of 1-bit booleans
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LICENSE= GPLv2
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LICENSE= GPLv2+
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USES= cran:auto-plist,compiles
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@ -1,3 +1,3 @@
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TIMESTAMP = 1581413439
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SHA256 (bit_1.1-15.2.tar.gz) = 0b83e78385293d6cdc0189a07fcc3f9f9db286c8c4af3288467f5257e79cb28b
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SIZE (bit_1.1-15.2.tar.gz) = 56964
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TIMESTAMP = 1596193005
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SHA256 (bit_4.0.3.tar.gz) = 6a680e2f8020496da8c7637480ce8afabc3072c98cfdd2c35c4ec7c5c6b66349
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SIZE (bit_4.0.3.tar.gz) = 279205
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@ -1,23 +1,6 @@
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True boolean datatype (no NAs), coercion from and to logicals,
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integers and integer subscripts; fast boolean operators and fast
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summary statistics. With 'bit' vectors you can store true binary
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booleans {FALSE,TRUE} at the expense of 1 bit only, on a 32 bit
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architecture this means factor 32 less RAM and ~ factor 32 more
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speed on boolean operations. Due to overhead of R calls, actual
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speed gain depends on the size of the vector: expect gains for
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vectors of size > 10000 elements. Even for one-time boolean operations
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it can pay-off to convert to bit, the pay-off is obvious, when such
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components are used more than once. Reading from and writing to bit
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is approximately as fast as accessing standard logicals - mostly
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due to R's time for memory allocation. The package allows to work
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with pre-allocated memory for return values by calling .Call()
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directly: when evaluating the speed of C-access with pre-allocated
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vector memory, coping from bit to logical requires only 70% of the
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time for copying from logical to logical; and copying from logical
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to bit comes at a performance penalty of 150%. the package now
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contains further classes for representing logical selections:
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'bitwhich' for very skewed selections and 'ri' for selecting ranges
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of values for chunked processing. All three index classes can be
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used for subsetting 'ff' objects (ff-2.1-0 and higher).
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Provided are classes for boolean and skewed boolean vectors, fast
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boolean methods, fast unique and non-unique integer sorting, fast
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set operations on sorted and unsorted sets of integers, and foundations
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for ff (range index, compression, chunked processing).
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WWW: https://cran.r-project.org/web/packages/bit/
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