diff options
Diffstat (limited to 'benchmark/bm_so_nsieve.rb')
-rw-r--r-- | benchmark/bm_so_nsieve.rb | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/benchmark/bm_so_nsieve.rb b/benchmark/bm_so_nsieve.rb index 59aead5893..a65cc78233 100644 --- a/benchmark/bm_so_nsieve.rb +++ b/benchmark/bm_so_nsieve.rb @@ -1,35 +1,35 @@ -# The Computer Language Shootout
-# http://shootout.alioth.debian.org/
-#
-# contributed by Glenn Parker, March 2005
-# modified by Evan Phoenix, Sept 2006
-
-def sieve(m)
- flags = Flags.dup[0,m]
- count = 0
- pmax = m - 1
- p = 2
- while p <= pmax
- unless flags[p].zero?
- count += 1
- mult = p
- while mult <= pmax
- flags[mult] = 0
- mult += p
- end
- end
- p += 1
- end
- count
-end
-
-n = 9 # (ARGV[0] || 2).to_i
-Flags = ("\x1" * ( 2 ** n * 10_000)).unpack("c*")
-
-n.downto(n-2) do |exponent|
- break if exponent < 0
- m = (1 << exponent) * 10_000
- # m = (2 ** exponent) * 10_000
- count = sieve(m)
- printf "Primes up to %8d %8d\n", m, count
-end
+# The Computer Language Shootout +# http://shootout.alioth.debian.org/ +# +# contributed by Glenn Parker, March 2005 +# modified by Evan Phoenix, Sept 2006 + +def sieve(m) + flags = Flags.dup[0,m] + count = 0 + pmax = m - 1 + p = 2 + while p <= pmax + unless flags[p].zero? + count += 1 + mult = p + while mult <= pmax + flags[mult] = 0 + mult += p + end + end + p += 1 + end + count +end + +n = 9 # (ARGV[0] || 2).to_i +Flags = ("\x1" * ( 2 ** n * 10_000)).unpack("c*") + +n.downto(n-2) do |exponent| + break if exponent < 0 + m = (1 << exponent) * 10_000 + # m = (2 ** exponent) * 10_000 + count = sieve(m) + printf "Primes up to %8d %8d\n", m, count +end |