Forth83 Benchmarks#
Below is a collection of some Benchmarks for Forth83 systems like VolksForth.
I found most of these benchmarks on comp.lang.forth
, Hans Bzemers 4th and Marcel Hendrix benchmark collection
Integer Calculations #
32000 constant intMax
variable intResult
: DoInt
1 dup intResult dup >r !
begin
dup intMax <
while
dup negate r@ +! 1+
dup r@ +! 1+
r@ @ over * r@ ! 1+
r@ @ over / r@ ! 1+
repeat
r> drop drop
;
Fibonacci 1#
: fib1 ( n1 -- n2 )
dup 2 < if drop 1 exit then
dup 1- recursive
swap 2- recursive + ;
Fibonacci 2#
: fib2 ( n1 -- n2 ) dup 2 < if drop 1 else dup 1- recursive swap 2 - recursive + then ;
Forth Nesting Benchmark#
\ Forth nesting (NEXT) Benchmark cas20101204
: bottom ;
: 1st bottom bottom ; : 2nd 1st 1st ; : 3rd 2nd 2nd ;
: 4th 3rd 3rd ; : 5th 4th 4th ; : 6th 5th 5th ;
: 7th 6th 6th ; : 8th 7th 7th ; : 9th 8th 8th ;
: 10th 9th 9th ; : 11th 10th 10th ; : 12th 11th 11th ;
: 13th 12th 12th ; : 14th 13th 13th ; : 15th 14th 14th ;
: 16th 15th 15th ; : 17th 16th 16th ; : 18th 17th 17th ;
: 19th 18th 18th ; : 20th 19th 19th ; : 21th 20th 20th ;
: 22th 21th 21th ; : 23th 22th 22th ; : 24th 23th 23th ;
: 25th 24th 24th ;
: 32million CR ." 32 million nest/unnest operations" 25th ;
: 1million CR ." 1 million nest/unnest operations" 20th ;
CR .( enter 1million or 32million )
Forth Memory Move Benchmark#
\ Forth Memory Move Benchmark cas 20101204
8192 CONSTANT bufsize
VARIABLE buf1 HERE bufsize 1+ allot BUF1 !
VARIABLE buf2 HERE bufsize 1+ allot BUF2 !
: test-CMOVE 49 0 DO BUF1 @ BUF2 @ bufsize CMOVE LOOP ;
: test-CMOVE> 49 0 DO BUF2 @ BUF1 @ bufsize CMOVE> LOOP ;
: test-MOVE> 49 0 DO BUF1 @ BUF2 @ bufsize MOVE LOOP ;
: test-<MOVE 49 0 DO BUF2 @ BUF1 @ bufsize MOVE LOOP ;
count bits in byte#
\ Forth Benchmark - count bits in byte cas 20101204
VARIABLE cnt
: countbits ( uu -- #bits )
cnt off
8 0 DO dup $01010101 and cnt +!
2/
LOOP drop
0 cnt 4 bounds DO i C@ + LOOP ;
: bench5
8192 DO I countbits . LOOP ;
Sieve Benchmark#
\ Sieve Benchmark -- the classic Forth benchmark cas 20101204
8192 CONSTANT SIZE VARIABLE FLAGS 0 FLAGS ! SIZE ALLOT
: DO-PRIME
FLAGS SIZE 1 FILL ( set array )
0 ( 0 COUNT ) SIZE 0
DO FLAGS I + C@
IF I DUP + 3 + DUP I +
BEGIN DUP SIZE <
WHILE 0 OVER FLAGS + C! OVER + REPEAT
DROP DROP 1+
THEN
LOOP
. ." Primes" CR ;
Greatest Common Divisor#
\ gcd - greatest common divisor cas 20101204
: gcd ( a b -- gcd )
OVER IF
BEGIN
DUP WHILE
2DUP U> IF SWAP THEN OVER -
REPEAT DROP ELSE
DUP IF NIP ELSE 2DROP 1 THEN
THEN ;
\ another gcd O(2) runtime speed cas 20101204
: gcd2 ( a b -- gcd )
2DUP D0= IF 2DROP 1 EXIT THEN
DUP 0= IF DROP EXIT THEN
SWAP DUP 0= IF DROP EXIT THEN
BEGIN 2DUP -
WHILE 2DUP < IF OVER -
ELSE SWAP OVER - SWAP
THEN
REPEAT NIP ;