Binary encoding for Hollerith that provides a total ordering for primitive datatypes and lists of those. Used by Hollerith and KWIC.
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This package has been deprecated; for more see
- the Future
- that leads to a new major version of Hollerith and
icql-dba-hollerith(TBD)
Breaking Change in v2.x: Prior to v2.x, when comparing two lists a, b where a is a prefix of b
used to be sorted with a first, then b, i.o.w. a shorter word always precedes a longer word that starts
out the same (as in an alphabetically sorted dictionary).
Starting with v2, however, this has been changed such that when comparing two lists a, b where a is a
prefix of b, b will be sorted before a if the first 'extra' element of b (i.e. b[ a.length ]) is
a negative number. By way of example, sorting now looks like this (with hexadecimal byte values):
[ -10, ] ... 4b bfdbffffffffffff 4c
[ -1, ] ... 4b c00fffffffffffff 4c
[ ] ... 4c
[ 0, ] ... 4d 0000000000000000 4c
[ 1, -1, ] ... 4d 3ff0000000000000 4b c00fffffffffffff 4c
[ 1, ] ... 4d 3ff0000000000000 4c
[ 1, 0, ] ... 4d 3ff0000000000000 4d 0000000000000000 4c
[ 1, 1, ] ... 4d 3ff0000000000000 4d 3ff0000000000000 4c
[ 10, -2, ] ... 4d 4024000000000000 4b bfffffffffffffff 4c
[ 10, -2, 3, ] ... 4d 4024000000000000 4b bfffffffffffffff 4d 4008000000000000 4c
[ 10, -1, ] ... 4d 4024000000000000 4b c00fffffffffffff 4c
[ 10, -1, 3, ] ... 4d 4024000000000000 4b c00fffffffffffff 4d 4008000000000000 4c
[ 10, ] ... 4d 4024000000000000 4c
[ 10, 0, ] ... 4d 4024000000000000 4d 0000000000000000 4c
[ 10, 0, 3, ] ... 4d 4024000000000000 4d 0000000000000000 4d 4008000000000000 4c
[ 10, 1, ] ... 4d 4024000000000000 4d 3ff0000000000000 4c
[ 10, 1, 3, ] ... 4d 4024000000000000 4d 3ff0000000000000 4d 4008000000000000 4c
[ 10, 2, ] ... 4d 4024000000000000 4d 4000000000000000 4c
[ 10, 2, 3, ] ... 4d 4024000000000000 4d 4000000000000000 4d 4008000000000000 4c
[ 10, 4, -2, ] ... 4d 4024000000000000 4d 4010000000000000 4b bfffffffffffffff 4c
[ 10, 4, -1, ] ... 4d 4024000000000000 4d 4010000000000000 4b c00fffffffffffff 4c
[ 10, 4, ] ... 4d 4024000000000000 4d 4010000000000000 4c
[ 10, 4, 0, ] ... 4d 4024000000000000 4d 4010000000000000 4d 0000000000000000 4c
[ 10, 4, 1, ] ... 4d 4024000000000000 4d 4010000000000000 4d 3ff0000000000000 4c
[ 10, 4, 2, ] ... 4d 4024000000000000 4d 4010000000000000 4d 4000000000000000 4c
hollerith_tng 0.236 s 300,000 items 1,269,827⏶Hz 788⏷nspc
hollerith_bcd 2.567 s 300,000 items 116,873⏶Hz 8,556⏷nspc
hollerith_classic 7.302 s 300,000 items 41,087⏶Hz 24,339⏷nspc
charwise 9.924 s 300,000 items 30,231⏶Hz 33,079⏷nspc
bytewise 15.028 s 300,000 items 19,963⏶Hz 50,092⏷nspc
03:05 HENGIST/BENCHMARKS ▶ hollerith_tng 1,141,367 Hz ≙ 1 ÷ 1.0 100.0 % │████████████▌│
03:05 HENGIST/BENCHMARKS ▶ hollerith_bcd 115,952 Hz ≙ 1 ÷ 9.8 10.2 % │█▎ │
03:05 HENGIST/BENCHMARKS ▶ hollerith_classic 40,913 Hz ≙ 1 ÷ 27.9 3.6 % │▌ │
03:05 HENGIST/BENCHMARKS ▶ charwise 30,099 Hz ≙ 1 ÷ 37.9 2.6 % │▍ │
03:05 HENGIST/BENCHMARKS ▶ bytewise 19,642 Hz ≙ 1 ÷ 58.1 1.7 % │▎ │