factor/extra/benchmark/dawes/dawes.factor

17 lines
407 B
Factor

USING: alien.c-types sequences kernel math specialized-arrays
fry ;
SPECIALIZED-ARRAY: int
IN: benchmark.dawes
! Phil Dawes's performance problem
: count-ones ( int-array -- n ) [ 1 = ] count ; inline
: make-int-array ( -- int-array )
120000 <iota> [ 255 bitand ] int-array{ } map-as ; inline
: dawes-benchmark ( -- )
200 make-int-array '[ _ count-ones ] replicate drop ;
MAIN: dawes-benchmark