array_wrapper.rb

# Code for benchmark
require 'benchmark'

vector = Daru::Vector.new(
  10000.times.map.to_a.shuffle,
  missing_values: 100.times.map.to_a.shuffle
  )
  
Benchmark.bm do |x|
  x.report("Sum of a vector using compact") do
    vector.data.sum_using_compact
  end
  
  x.report("Sum of a vector without compact") do
    vector.data.sum_without_compact
  end
end
# END

# code for sum
      def compact
        @data - @context.missing_values
      end

      def sum_using_compact
        compact.inject :+
      end
      
      def sum_without_compact
        @data.inject do |sum, x|
          unless @context.missing_values.include? x
            sum += x
          end
          sum
        end
      end
# END