* benchmark/driver.rb: fix notations.

* benchmark/bm_loop_whileloop.rb: ditto.
* benchmark/bm_loop_whileloop2.rb: ditto.
* benchmark/bm_app_uri.rb: added.
* benchmark/bm_vm1_ivar_set.rb: ditto.
* benchmark/bm_so_binary_trees.rb: added from Computer Language
  Benchmarks Game (http://shootout.alioth.debian.org/).
* benchmark/bm_so_fannkuch.rb: ditto.
* benchmark/bm_so_mandelbrot.rb: ditto.
* benchmark/bm_so_meteor_contest.rb: ditto.
* benchmark/bm_so_nbody.rb: ditto.
* benchmark/bm_so_nsieve.rb: ditto.
* benchmark/bm_so_nsieve_bits.rb: ditto.
* benchmark/bm_so_partial_sums.rb: ditto.
* benchmark/bm_so_pidigits.rb: ditto.
* benchmark/bm_so_spectralnorm.rb: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13548 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 35 insertions, 0 deletions

diff --git a/benchmark/bm_so_nsieve.rb b/benchmark/bm_so_nsieve.rb
new file mode 100644
index 0000000000..59aead5893
--- /dev/null
+++ b/benchmark/bm_so_nsieve.rb
@@ -0,0 +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