pidigits Ruby yjit #5 program
source code
# The Computer Language Benchmarks Game
# https://salsa.debian.org/benchmarksgame-team/benchmarksgame/
# contributed by Aaron Tavistock
# fixed by SO Alex
# Leverage GMP like all the other languages
require_relative "gmp.so"
# Helpers that improve readability
class GMP::Z
def mul!(a,b)
GMP::Z.mul(self, a, b)
end
def times!(a)
GMP::Z.mul(self, self, a)
end
end
# Constants to reduce object instantiation and casting
ZERO = GMP::Z(0)
ONE = GMP::Z(1)
TWO = GMP::Z(2)
THREE = GMP::Z(3)
TEN = GMP::Z(10)
# Allocate these expensive objects once
@display_chunk = GMP::Z(0)
@k = GMP::Z(0)
@a = GMP::Z(0)
@t = GMP::Z(0)
@u = GMP::Z(0)
@k1 = GMP::Z(1)
@n = GMP::Z(1)
@d = GMP::Z(1)
@tmp = GMP::Z(0)
def next_chunk
@tmp.mul!(@d, @t)
@a.sub!(@tmp)
@a.times!(TEN)
@n.times!(TEN)
end
def produce_chunk
@k.add!(ONE)
@t.mul!(@n, TWO)
@n.times!(@k)
@a.add!(@t)
@k1.add!(TWO)
@a.times!(@k1)
@d.times!(@k1)
if @a >= @n
@tmp.mul!(@n, THREE)
@tmp.add!(@a)
@t = @tmp.fdiv(@d)
@u = @tmp.fmod(@d)
@u.add!(@n)
if @d > @u
@display_chunk.times!(TEN)
@display_chunk.add!(@t)
return true
end
end
false
end
N = (ARGV[0] || 100).to_i
count = 0
while(count < N) do
if produce_chunk
count += 1
if count % 10 == 0
STDOUT.write "%010d\t:%d\n" % [@display_chunk.to_i, count]
@display_chunk.times!(ZERO)
end
next_chunk
end
end
if @display_chunk.to_i > 0
STDOUT.write "%s\t:%d\n" % [@display_chunk.to_s.ljust(10), count]
end
notes, command-line, and program output
NOTES:
64-bit Ubuntu quad core
ruby 3.3.5
(2024-09-03
revision ef084cc8f4)
+YJIT [x86_64-linux]
Wed, 04 Sep 2024 20:56:01 GMT
COMMAND LINE:
/opt/src/ruby-3.3.5/bin/ruby --yjit -W0 pidigits.ruby-5.ruby 10000
(TRUNCATED) PROGRAM OUTPUT:
3141592653 :10
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