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 performance measurements

Each table row shows performance measurements for this Ruby program with a particular command-line input value N.

 N  CPU secs Elapsed secs Memory KB Code B ≈ CPU Load
120.530.535,732412  4% 0% 2% 100%
1611.0711.0827,948412  1% 1% 1% 100%
20227.06227.16400,436412  0% 0% 1% 100%

Read the ↓ make, command line, and program output logs to see how this program was run.

Read binary-trees benchmark to see what this program should do.

 notes

ruby 2.1.0p0 (2013-12-25 revision 44422) [i686-linux]

 binary-trees Ruby program source code

# The Computer Language Benchmarks Game
# http://benchmarksgame.alioth.debian.org
#
# contributed by Jesse Millikan
# Modified by Wesley Moxam


def item_check(left, item, right)
  return item if left.nil?
  item + item_check(*left) - item_check(*right)
end

def bottom_up_tree(item, depth)
  return [nil, item, nil] unless depth > 0
  item_item = 2 * item
  depth -= 1
  [bottom_up_tree(item_item - 1, depth), item, bottom_up_tree(item_item, depth)]
end

max_depth = ARGV[0].to_i
min_depth = 4

max_depth = min_depth + 2 if min_depth + 2 > max_depth

stretch_depth = max_depth + 1
stretch_tree = bottom_up_tree(0, stretch_depth)

puts "stretch tree of depth #{stretch_depth}\t check: #{item_check(*stretch_tree)}"
stretch_tree = nil

long_lived_tree = bottom_up_tree(0, max_depth)

min_depth.step(max_depth + 1, 2) do |depth|
  iterations = 2**(max_depth - depth + min_depth)

  check = 0

  for i in 1..iterations
    temp_tree = bottom_up_tree(i, depth)
    check += item_check(*temp_tree)

    temp_tree = bottom_up_tree(-i, depth)
    check += item_check(*temp_tree)
  end

  puts "#{iterations * 2}\t trees of depth #{depth}\t check: #{check}"
end

puts "long lived tree of depth #{max_depth}\t check: #{item_check(*long_lived_tree)}"

 make, command-line, and program output logs

Tue, 07 Jan 2014 21:26:00 GMT

COMMAND LINE:
/usr/local/src/ruby-2.1.0/ruby binarytrees.yarv 20

PROGRAM OUTPUT:
stretch tree of depth 21	 check: -1
2097152	 trees of depth 4	 check: -2097152
524288	 trees of depth 6	 check: -524288
131072	 trees of depth 8	 check: -131072
32768	 trees of depth 10	 check: -32768
8192	 trees of depth 12	 check: -8192
2048	 trees of depth 14	 check: -2048
512	 trees of depth 16	 check: -512
128	 trees of depth 18	 check: -128
32	 trees of depth 20	 check: -32
long lived tree of depth 20	 check: -1

Revised BSD license

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